at θ = 60°, the block will start sliding down the plane and on further increasing θ, it will topple at certain θ

at θ = 30°, the block will start sliding down the plane

the block will remain at rest on the plane upto certain θ and then it will topple

at θ = 60°, the block will start sliding down the plane and continue to do so at higher angles

The area represents the object's change in acceleration

The area represents the object's acceleration

The area represents the object's change in velocity

The area represents the object's velocity

JEE Questions for Physics Laws Of Motion Quiz 3

In the given figure, the pulley is assumed massless and frictionless. If the friction force on the object of mass m is f, then its acceleration in terms of the force F will be equal to
Physics-Laws of Motion-76559.png

0%
0%
2)
0%
0%
None of these

A block moving on a surface with velocity 20 ms^-1 comes to rest because of surface friction over a distance of 40 m. The coefficient of dynamic friction is (take, g =10 ms^-2)

0%
0.5
0%
0.3
0%
0.2
0%
0.1

Two blocks of masses M and m are connected by a string passing over a pulley as shown in the figure. The downward acceleration of the block with mass m is

0%
M / (m + M) g
0%
mg / (m + M)
0%
(m + M) / mg
0%
(n + M) / Mg

A block of mass m is placed on a surface with a vertical cross-section given by y = x³/6. If the coefficient of friction is 0.5, the maximum height above the ground at which the block can be placed without slipping is

0%
0%
2)
0%
0%

A box is lying on an inclined plane what is the coefficient of static friction if the box starts sliding when an angle of inclination is 60°

0%
1.173
0%
1.732
0%
2.732
0%
1.677

To determine the coefficient of friction between a rough surface and a block, the surface is kept inclined at 45° and the block is released from rest. The block takes a time t in moving a distance d. The rough surface is then replaced by a smooth surface and the same experiment is repeated. The block now takes a time t/2 in moving down the same distance d. The coefficient of friction is

0%
3/4
0%
5/4
0%
1/2
0%

The force required to move a body up a rough inclined plane is double the force required to prevent the body from sliding down the plane. The coefficient of friction, when the angle of inclination of the plane is 60° is

0%
0%
2)
0%
0%

A cart is sliding down a low friction incline. A device on the cart launches a ball, forcing the ball perpendicular to the incline, as shown above. Air resistance is negligible. Where will the ball land relative to the cart ?

0%
Front of the cart
0%
Back of the cart
0%
Land in the cart
0%
None of the above

A sphere rolls down an inclined plane of inclination θ. What is the acceleration as the sphere reaches bottom?

0%
0%
2)
0%
0%

A small block of mass of 0.1 kg lies on a fixed inclined plane PQ which makes an angle θ with the horizontal. A horizontal force of 1 N acts on the block through its centre of mass as shown in the figure. The block remains stationary if (take, g =10 m/ s²)
Physics-Laws of Motion-76585.png

0%
θ =45°
0%
θ > 45 ° and a frictional force acts on the block towards P
0%
θ> 45 ° and a frictional force acts on the block towards Q
0%
θ < 45 ° and a frictional force acts on the block towards Q

A block kept on a rough surface starts sliding when the inclination of the surface is θ with respect to the horizontal. The coefficient of static friction between the block and the surface is

0%
sec θ
0%
sin θ
0%
tan θ
0%
cos θ

0%
60°
0%
45°
0%
30°
0%
15°

A block at rest slides down a smooth inclined plane which makes an angle 60° with the vertical and it reaches the ground in t₁ second. Another block is dropped vertically from the same point and reaches the ground in t₂ second. Then, the ratio of t₁ : t₂ is

0%
1 : 2
0%
2 : 1
0%
1 : 3
0%
0%
3 : 1

Two fixed frictionless inclined plane making an angle 30° and 60° with the vertical are shown in the figure. Two blocks A and B are placed on the two planes. What is the relative vertical acceleration of A with respect to B ?
Physics-Laws of Motion-76592.png

0%
4.9 ms-2 in horizontal direction
0%
9.8 ms-2 in vertical direction
0%
zero
0%
4.9 ms-2 in vertical direction

A coin of mass 10 g is placed over a book of length 50 cm. The coin is on the verge of sliding when one end of the book is lifted 10 cm up. The coefficient of static friction between the book and the coin is

0%
1.0
0%
0.4
0%
0.3
0%
0.2

0%
at θ = 30°, the block will start sliding down the plane
0%
the block will remain at rest on the plane upto certain θ and then it will topple
0%
at θ = 60°, the block will start sliding down the plane and continue to do so at higher angles
0%
at θ = 60°, the block will start sliding down the plane and on further increasing θ, it will topple at certain θ

Force required to move a mass of 1 kg at rest on a horizontal rough plane (µ = 0.1 and g = 9.8 ms^-2) is

0%
0.98 N
0%
0.49 N
0%
9.8 N
0%
4.9 N

Two blocks of masses m and 2m are connected by a light string passing over a frictionless pulley. As shown in the figure, the mass m is placed on a smooth inclined plane of inclination 30° and 2m hangs vertically. If the system is released, the blocks move with an acceleration equal to
Physics-Laws of Motion-76598.png

0%
0%
2)
0%
0%

If a block slides down a plane inclined at 30° with horizontal, then the coefficient of friction between the block and inclined plane is

0%
0.5
0%
2)
0%
0%

0%
Zero
0%
2 ms-2
0%
1.5 ms-2
0%
5 ms-2

A block rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, the mass of the block (in kg) is (take, g =10 ms^-2)

0%
2.0
0%
4.0
0%
1.6
0%
2.5

A body of mass 5 kg is suspended by a spring balance on an inclined plane as shown in figure. The spring balance measure
Physics-Laws of Motion-76611.png

0%
50 N
0%
25 N
0%
500 N
0%
10 N

A block is kept on a frictionless inclined surface with angle of inclination α. The incline is given an acceleration α to keep the block stationary. Then, α is equal to
Physics-Laws of Motion-76613.png

0%
0%
2)
0%
0%

0%
60°
0%
45°
0%
30°
0%
15°

A particle of mass 2 kg is initially at rest. A force acts on it whose magnitude changes with the time. The force-time graph is shown below. The velocity of the particle after 10 s is
Physics-Laws of Motion-76621.png

0%
20 ms-1
0%
10 ms-1
0%
75 ms-1
0%
26 ms-1
0%
50 ms-1

A smooth block is released at rest on a 45° incline and then slides a distance d. The time taken to slide is n times as much to slide on rough incline than on a smooth incline. The coefficient of friction is

0%
0%
2)
0%
0%

Statement I : A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the table.
Statement II : For every action, there is an equal and opposite reaction.

0%
Statement I is correct, Statement II is correct, Statement II is a correct explanation for Statement I
0%
Statement 1 is correct, Statement II is correct, Statement II is incorrect explanation for Statement I
0%
Statement I is correct, Statement II is incorrect
0%
Statement I is incorrect, Statement II is correct

A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. If a force P is applied at the free end of the rope, the force exerted by the rope on the block is

0%
0%
2)
0%
P
0%

0%
5 s
0%
20 s
0%
40 s
0%
80 s

0%
0%
2)
0%
0%

The position – time graph of a particle of mass 4 kg is shown in the figure. Calculate the impulse (in MKS units) at time t= 0 and t= 6 s respectively
Physics-Laws of Motion-76635.png

0%
+6.31 and –6.31
0%
+3.33 and –3.33
0%
+5.25 and –5.25
0%
+3.25 and –3.25

0%
The area represents the object's change in acceleration
0%
The area represents the object's acceleration
0%
The area represents the object's change in velocity
0%
The area represents the object's velocity

A ball of mass 0.2 kg rests on a vertical post of height 5 m. A bullet of mass 0.01 kg, travelling with a velocity v m/s in a horizontal direction, hits the centre of the ball. After the collision, the ball and bullet travel independently. The ball hits the ground at a distance of 20m and the bullet at a distance of 100m from the foot of the post. The initial velocity v of the bullet is
Physics-Laws of Motion-76639.png

0%
250 m/s
0%
2)
0%
400 m/s
0%
500 m/s

The figure shows the position-time (x – t) graph of one-dimensional motion of a body of mass 0.4 kg. The
Physics-Laws of Motion-76642.png

0%
0.4 Ns
0%
0.8 Ns
0%
1.6 Ns
0%
0.2 Ns

0%
0%
2)
0%
0%

0%
0%
2)
0%
0%
0%

A 5000 kg rocket is set for vertical firing. The exhaust speed is 800 ms^-1. To give an initial upward acceleration of 20 ms^-2, the amount of gas ejected per second to supply the needed thrust will be (take,g =10 ms^-2 )

0%
127.5 kgs-1
0%
187.5 kgs-1
0%
185.5 kgs-1
0%
137.5 kgs-1

0%
0%
2)
0%
0%

An object is kept on a smooth inclined plane of 1 in l. The horizontal acceleration to be imparted to the inclined plane so that the object is stationary relative to the inclined is

0%
0%
2)
0%
0%

A body of weight 2 kg is suspended as shown in figure. The tension T₁ in the horizontal string (in kg–wt) is
Physics-Laws of Motion-76669.png

0%
0%
2)
0%
0%
2

A block of mass M placed on a frictionless horizontal table is pulled by an other block of mass m hanging vertically by a massless string passing over a frictionless pulley. The tension in the string is

0%
0%
2)
0%
0%

A block A weighing 100 kg rests on a block B and is tied with a horizontal string to the wall at C. Block B weighs 200 kg. The coefficient of friction between A and B is 0.25 and between B and the surface is 1/3. The horizontal force P necessary to move the block B should be (take, g =10m/s²)
Physics-Laws of Motion-76679.png

0%
1150 N
0%
1250 N
0%
1300 N
0%
1420 N

The coefficient of limiting friction μ is defined as

0%
0%
2)
0%
0%

Block A of mass m and block B of mass 2m are placed on a fixed triangular wedge by means of a massless, inextensible string and a frictionless pulley as shown in figure. The wedge is inclined at 45° to the horizontal on both the sides. The coefficient of friction between the block A and the wedge is 2/3 and that between the block B and the wedge is 1/3 and both the blocks A and B are released from rest, the acceleration of A will be
Physics-Laws of Motion-76686.png

0%
-1
0%
1.2
0%
0.2
0%
zero

The tension in the string in the pulley system shown in the figure is
Physics-Laws of Motion-76688.png

0%
75 N
0%
80 N
0%
7.5 N
0%
30 N

Two blocks of masses 1 kg and 2 kg are connected by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is 2 x 109 Nm^-2. What should be the minimum radius of the wire used if it is not to break? (take, g =10 ms^-2)
Physics-Laws of Motion-76690.png

0%
0%
2)
0%
0%

Two masses A and B of 15 kg and 10 kg are connected with a string passing over a frictionless pulley fixed at the corner of a table (as shown in figure). The coefficient of friction between the table and block is 0.4. The minimum mass of C, that may be placed on A to prevent it from moving is
Physics-Laws of Motion-76696.png

0%
10 kg
0%
5 kg
0%
zero
0%
15 kg

Two masses m₁and m₂ (m₁ > m₂) are connected by massless flexible and inextensible string passed over massless and frictionless pulley. The acceleration of centre of mass is

0%
0%
2)
0%
0%
zero

A block of mass m is on an inclined plane of angle θ. The coefficient of friction between the block and the plane is μ and tan θ > μ . The block is held stationary by applying a force P parallel to the plane. The direction of force pointing up the plane is taken to be positive. As P is varied from P₁ = mg (sin θ – μ cos θ) to P₂ = mg (sin θ + μ cos θ), the frictional force f versus P graph will look like
Physics-Laws of Motion-76702.png

0%
0%
2)
0%
0%

A block of mass 200 kg is being pulled up by men on an inclined plane at angle of 45° as shown in the figure. The coefficient of static friction is 0.5. Each man can only apply a maximum force of 500 N. Calculate the number of men required for the block to just start moving up the plane.
Physics-Laws of Motion-76708.png

0%
10
0%
15
0%
5
0%
3

JEE Questions for Physics Laws Of Motion Quiz 3 - MCQExams.com

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Practice Physics Quiz Questions and Answers

JEE Questions for Physics Laws Of Motion Quiz 3 - MCQExams.com

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Practice Physics Quiz Questions and Answers

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