JEE Questions for Physics Laws Of Motion Quiz 5

The velocity of a body of mass 20 kg decreases from 20ms^–1 to 5ms^–1 in a distance of 100 m. Force on the body is

0%
–27.5 N
0%
–47.5 N
0%
–37.5 N
0%
–67.5 N

A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes upto 2 m height further, find the magnitude of the force. (Consider g = 10 ms^–2)

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16 N
0%
20 N
0%
22 N
0%
4 N

Formula for true force is

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0%
2)
0%
0%

0%
0o
0%
30o
0%
45o
0%
90o

Force of 5 N acts on a body of weight 9.8 N. what is the acceleration produced in ms^–2

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49.00
0%
5.00
0%
1.46
0%
0.51

A lift is going up. The total mass of the lift and the passenger is 1000 kg The variation in the speed of the lift is as given in the graph. The tension in the rope pulling the lift at t = 10.5 sec will be
Physics-Laws of Motion-76823.png

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8000 N
0%
Zero
0%
12000 N
0%
17400 N

Same force acts on two bodies of different masses 2 kg and 4 kg initially at rest. The ratio of times required to acquire same final velocity is

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2 : 1
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1 : 2
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1 : 1
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4 : 16

Which of the following quantities measured from different inertial reference frames are same

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Force
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Velocity
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Displacement
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Kinetic Energy

10,000 small balls, each weighing 1 g strike one square cm of area per second with a velocity 100 ms^–1in a normal direction and rebound with the same velocity. The value of pressure on the surface will be

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0%
2)
0%
0%

A particle moves in the XY Plane under the action of a force F such that the components of its linear momentum P at any time t are Px = 2 cost, Py = 2 sint. The angle between F and P at time t is

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90o
0%
0o
0%
180o
0%
30o

A player caught a cricket ball of mass 150 g moving at the rate of 20 ms^–1. If the catching process be completed in 0.1 s the force of the blow exerted by the ball on the hands of player is

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0.3 N
0%
30 N
0%
300 N
0%
3000 N

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

Swimming is possible on account of

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First law of motion
0%
second law of motion
0%
Third law of motion
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Newton's law of gravitation

A cold soft drink is kept on the balance.When the cap is open, then the weight

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Increases
0%
Decreases
0%
First increase then decreases
0%
Remains same

A wagon weighing 1000 kg is moving with a velocity 50 km h^–1 on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which it moves now is

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.5 km h–1
0%
20 km h–1
0%
40 km h–1
0%
50 km h–1

The Figure shows the Position-time (x-t) graph of one dimensional motion of a body of mass 0.4 kg. The magnitude of each impluse is
Physics-Laws of Motion-76836.png

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

0%
0%
2)
0%
0%

0%
0%
29 N
0%
26 N
0%

A particle of mass 2 kg is initially at rest. A force acts on it whose magnitude changes with time. The force time graph is shown below.
Physics-Laws of Motion-76847.png

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10 ms–1
0%
20 ms–1
0%
75 ms–1
0%
50 ms–1

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32 N
0%
4 N
0%
2 N
0%
8 N

0%
5
0%
4
0%
3
0%
2

A car travelling at a speed of 30 km/h is brought to a halt in 8 metres by applying brakes. If the same car is travelling at 60 km/h it can be brought to a halt with the same breaking power in

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8 m
0%
16 m
0%
24 m
0%
32 m

A given object takes n times more time to slide down 45^o rough inclined plane as it takes to slide down a perfactly smooth 45^o incline. The coefficient of kinetic friction between the object and the incline is

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0%
2)
0%
0%

Two bodies of equal masses revolve in circular orbits of radii R₁ and R₂ with the same period Their centripetal forces are in the ratio.

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0%
2)
0%
0%

Two masses M and M/2 are joined together by means of light inextensible string passed over a frictionless pulley as shown in fig. When the bigger mass is released, the small one will ascend with an acceleration
Physics-Laws of Motion-76864.png

0%
0%
2)
0%
0%

A 0.5 kg ball moving with a speed of 12 ms^–1 strikes a hard wall at an angle of 30^o with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.025 S the average force acting on the wall is

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96 N
0%
48 N
0%
24 N
0%
12 N

A shell of mass 200g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 KJ of energy. The initial velocity of the shell is

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100 ms–1
0%
80 ms–1
0%
40 ms–1
0%
120 ms–1

A gramophone record is revolving with an anguler velocity ω. A coin is placed at a distance r from the centre of the record. The coefficient of static friction is . The coin will revolve with the record if

0%
0%
2)
0%
0%

A stone of mass 2 k g is tied to a string of length 0.5 m It the breaking tension of the string is 900N, then the maximum angular velocity the stone can have in uniform circular motion is

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30 rad/s
0%
20 rad/s
0%
10 rad/s
0%
25 rad/s

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240 N
0%
150 N
0%
220 N
0%
192 N

A sparrow flying in air sits on a stretched telegraph wire. If the weight of the sparrow is W ,which of the following is true about the tension T produced in the wire?

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T = W
0%
T < W
0%
T = 0
0%
T > W

Fig. shows the displacement of a particle going along X-axis as a function of time. The force acting on the particle is zero in the region
Physics-Laws of Motion-76880.png

0%
AB
0%
BC
0%
CD
0%
None of these

A Force (F) varies with time (t) as shown in fig. Average force over a complete cycle is-
Physics-Laws of Motion-76882.png

0%
Zero
0%
2)
0%
0%

0%
0.02
0%
0.20
0%
0.030
0%
Zero

The average force necessary to stop a hammer with 25 NS momentun in 0.04 sec is ________ N

0%
625
0%
125
0%
50
0%
25

Newton's third law of motion leads to the law of conservation of

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Angular momentum
0%
Energy
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Mass
0%
Momentum

A ball falls on surface from 10 m height and rebounds to 2.5 m. If duration of contact with floor is 0.01 sec. then average acceleration during contact is ____________ms^–2

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2100
0%
1400
0%
700
0%
400

0%
50
0%
500
0%
5000
0%
1000

0%
Proportional to t
0%
2)
0%
Zero
0%
Constant

A vessel containing water is given a constant acceleration a towards the right, along a straight horizontal path. which of the following diagram represents the surface of the liquid ?

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0%
2)
0%
0%

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9.25 ms–1
0%
5 ms–1
0%
14.25 ms–1
0%
4.25 ms–1

which of the following statement is correct?

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A body has a constant velocity but a varying speed.
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A body has a constant speed but a varying value of acceleration.
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A body has a constant speed and zero acceleration.
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A body has a constant speed but velocity is zero.

A force of 8 N acts on an object of mass 5kg in X- direction and another force of 6 N acts on it in Y - direction. Hence, the magnitude of acceleration of object will be

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1.5 ms–2
0%
2.0 ms–2
0%
2.5 ms–2
0%
3.5 ms–2

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0%
2)
0%
0%

It is easier to roll a barrel than pull it along the road.
This statement is

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False
0%
True
0%
Uncertain
0%
Not possible

A plate of mass M is placed on a horizontal friction less surface and a body of mass m is placed on this plate, The coefficient of dynamic friction between this body and the plate is µ. If a force 2µmg. is applied to the body of mass m along the horizontal direction the acceleration of the plate will be __________
Physics-Laws of Motion-76906.png

0%
0%
2)
0%
0%

On the horizontal surface of a truck ( = 0.6 ), a block of mass 1 kg is placed. If the truck is accelerating at the rale of 5m/s² then frictional force on the block will be ___________ N

0%
5
0%
6
0%
5.88
0%
8

Two blocks of mass 8 kg and 4 kg are connected a heavy string Placed on rough horizontal Plane, The 4 kg block is Pulled with a constant force F.The co-efficient of friction between the blocks and the ground is 0.5, what is the value of F, So that the tension in the spring is constant throughout during the motion of the blocks ? ( g = 10 ms^–2)
Physics-Laws of Motion-76912.png

0%
40 N
0%
60 N
0%
50 N
0%
30 N

Seven blocks, each of mass 1 kg are arranged one above the other as shown in figure. what are the values of the contact forces exerted on the third block by the forth and the second block respectively ? (g = 10 ms^–2)
Physics-Laws of Motion-76914.png

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40 N, 50 N
0%
50 N, 40 N
0%
40 N, 20 N
0%
50 N, 30 N

A man is standing on a spring balance. Reading of spring balance is 60 kgf. If man jumps outside balance, then reading of spring balance ________

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First increase than decreases to zero
0%
Decreases
0%
Increases
0%
Remains same

JEE Questions for Physics Laws Of Motion Quiz 5 - MCQExams.com

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JEE Questions for Physics Laws Of Motion Quiz 5 - MCQExams.com

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Practice Physics Quiz Questions and Answers

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