<div>PHYSICS-Force and Motion (SMART INSTITUTE)</div> <div> </div> <div><img class="img-auto" style="min-width: 100px; max-width: 1280px;" src="https://www.quiz-maker.com/3012/CDN/85-4062699/whatsapp-0318-1617-696-smart-institute-for-more-assessment-tests-.jpeg" alt="WhatsApp 0318 1617 696 (SMART INSTITUTE) FOR MORE ASSESSMENT TESTS." width="100%" /></div> | Take the Quiz

01-The average force necessary to stop a hammer with 25 Ns momentum & 0.05s expressed in "N" is

500

125

02-Newton's third law concerns the forces of interaction between two bodies. WOF statement relating to the third law is not correct?

Two forces must be the same types

Two forces must act on different bodies

Two forces always opposite in direction

The two forces are equal and opposite so the bodies are in equilibrium

03-A sledge of mass 25 kg is pulled across level ground with a horizontal force of 60N. The constant force of friction is 20N. What is the acceleration of the sledge?

0.5 ms-2

2 ms-2

1.6 ms-2

0.2 ms-2

04-When a force of 4N acts on a mass of 2 kg for a time of 2 sec, what is the rate of change of momentum?

2 kgms-2

8 kgms-2

4 kgms-2

16 kgms-2

05-It is easier to turn a steering wheel with both hands than with a single hand because

Accelerating force increases on the wheel

Two hands provide more grip

Two forces act on the wheel

Couple acts on the wheel

06-A heavy uniform plank of length L is supported by two forces F1 and F2 at points distant L/8 and L/4 from its ends as shown in the diagram. What is the ratio of F1 to F2?

2:5

3:5

5:8

2:3

07-A handball is tossed vertically upwards with a velocity of 19.6 ms-1. Approximately how high will it rise?

15m

25m

20m

30m

08-The engine of a car produces an acceleration of 6 ms-2 in the car. If this car pulls another car of the same mass, then the acceleration would be

6 ms-2

12 ms-2

3 ms-2

1.5 ms-2

09-The figure shows the velocity time graph of a one dimensional motion. WOF characteristic of the particle is represented by the shaded area?

Distance covered

Momentum

Speed

Acceleration

10-A cricket ball of mass 0.5 kg strikes a bat normally with a velocity of 30 ms-1 and rebounds with a velocity of 20 ms-1 in the opposite direction. The impulse of the force exerted by the ball on the bat is

0.5 Ns

05 Ns

1.0 Ns

50 Ns

11-If the force acting on a body is doubled, then acceleration becomes

Half

One fourth

Doubled

Constant

12-A particle starts from center O towards OA then moves along AB and stops at B. If R=100 m then displacement of the particle is

100 m

100/√2

100 √2

13-A balloon is acted by three forces, weight(9000N), upthrust(10000N) and sideway force to the wind(500N), as shown in diagram. What is the vertical component of the resultant force on the balloon?

500 N

10,000 N

1000 N

10500 N

14-A force of 6 N acts on a mass of 1 kg which acquires velocity of 30 ms-1. The time for which the force acts is:

26 s

5 s

6 s

2 s

15-A vehicle with front wheel drive accelerates in the diagram shown. Which diagram best shows direction of the total force exerted by road on the front wheels?

16-The diagram shows a cord supporting a picture. Which of the graph shown in the figure correctly represents the relationship between the tension 'T' in the cord and the angle 'θ'?

17-The instantaneous acceleration is the limit of average acceleration as Δt→0 is given by

18-When force of 1 N is applied on a body of mass 100 g then the acceleration would be

5 ms-2

10 ms-2

0.5 ms-2

0.1 ms-2

19-Which shows the correct relation between time of flight T and maximum height H?

H=gT^2 / 8

H=8T^2/ g

H=8g /T^2

H=8 / gT^2

20-At maximum height on the trajectory which of projectile becomes zero

Acceleration

Velocity

Vertical velocity

Horizontal velocity

21-If an object is moving with constant velocity of 20 ms-1 towards north then its acceleration will be

5 ms-2

9 ms-2

10 ms-2

0 ms-2

22-A mass of 10 kg moves with an acceleration of 10 ms-2, the force on it is:

5 N

50 N

100 N

25 N

23-Time taken by a projectile to reach the maximum height is t=

Vi sinθ / 2g

Vi sin2θ / 2g

Vi sinθ / g

2Vi sinθ / g

24-Two projectiles are projected at an angle of 20' and 70' with same velocity which one have longer range

Which is fired at 20'

Which is fired at 70'

Both have same range

None of these

26-The graph relates to the motion of a body. Which is a correct description of the graph?

Y is distance and air resistance is negligible

Y is distance and air resistance is not negligible

Y is speed and air resistance is negligible

Y is speed and air resistance is not negligible

27-Which graph represents the motion of a car that is travelling along a straight road with a uniformly increasing speed?

28-When force of 1N is applied on a body of mass 100 g then the acceleration would be

5 ms-2

10 ms-1

10 ms-2

0.1 ms-2

29-The retardation is defined as

Increase in velocity per unit time

Decrease in speed per unit time

Decrease in velocity per unit time

Increase in speed per unit time

30-A projectile is launched at point O and follows the path OPQRS, as shown. Air resistance may be neglected. Which statement is true for the projective when it is at the highest point Q of its path?

The horizontal component of the projectile's acceleration is zero

The horizontal component of the projectile's velocity is zero

The kinetic energy of the projectile is zero

The momentum of the projectile is zero

31-Two equal masses travel towards each other on a frictionless air track at speeds of 60 cms-1 and 30 cms-1 . They stick together on impact. What is the speed of the masses after impact?

15 cms-1

20 cms-1

30 cms-1

45 cms-1

32-A particle is moving in a straight line with uniform acceleration. Which graph represents the motion of the particle?

33-Which is a statement of the principle of conservation of momentum?

A force is equal to the rate of change of momentum of the body upon which it acts.

In a perfectly elastic collision, the relative momentum of the bodied before impact is equal to their relative momentum after impact

The momentum of a body is the product of the mass of the body and its velocity

The total momentum of a system of interacting bodies remains constants, providing no external force acts.

35-A force of 12 N gives an object an acceleration of 4 ms-2. The force required to give it an acceleration of 10 ms-2 is

15 N

20 N

25 N

30 N

36-Length of the path of a particle is equal to the magnitude of the displacement of that particle. Shape of the path possible

Circle

Parabola

Arc of a circle

Straight line

37-For WOF pair of projection angle, the horizontal range will be the same?

45' , 55'

27' , 63'

58' , 64'

33' , 85'

39-The shortest distance between two points is called

Acceleration

Speed

Displacement

Velocity

40-WOF pair of angles has same ranges at which bodies must be projected?

13' , 57'

63' , 27'

33' , 47'

93' , 7'

41-What gives the value of a body acceleration?

The area under its displacement graph

The area under its velocity time graph

The gradient of its displacement time graph

The gradient of its velocity time graph

42-A football of mass 0.4 kg at rest acquires a speed of 20 ms-1 when kicked. What is the impulse imparted to ball?

4 N s

5 N s

2 N s

8 N s

43-The velocity of projectile at its maximum height is

Zero

Minimum

Maximum

In between maximum and minimum

45-When a force of 5 N acts on a mass of 3 Kg for a time of 2 sec. What is the rate of change of momentum?

5 kg ms-2

410 kg ms-2

2.5 kg ms-2

6 kg ms-2

46-Two identical discs slip from top of two identical planes of slant length x and 2x but height h is same as shown in figure. The velocities V1 and V2 acquired by the discs, when they reach the bottom of the incline, are related as (neglecting all frictional effects)

V1=V2

V1=2V2

2V1=V2

NONE OF THESE

47-Which one is correct relation

A=Vf-Vi/2t

A=Vf^2 + Vi^2 / 2S

A=2(S - Vi t)/ t^2

A=(S + Vi t)/2t^2

48-If the slope of velocity time graph gradually decreases then the body is said to be moving with

Positive acceleration

Uniform velocity

Negative acceleration

None of these

49-An aeroplane is flying horizontally at a velocity v. It drops a packet from a height h, the time taken by the packet to reach the ground will be:

�2h/g

�h/2g

�2v/g

�v/h

50-A graph is drawn with force along Y-axis and time along X-axis. The area under the graph represents

Momentum

Momentum of the force

Couple

Impulse of the force

51-Two cars are moving in opposite directions with speed v. What is the magnitude of their relative velocity?

V/2

52-When the net torque acting on a system is zero, WOF will be constant?

Angular momentum

Velocity

Force

Linear momentum

53-A man in a car moving with velocity of 36 km/h. His speed w.r.t the car is

10 m/s

36 m/s

Infinite

54-A car travelling at a speed of 30 km/h is brought to a halt in 8 m by applying brakes. If the same car is travelling at 60 km/h, it can be brought to a halt with the same braking force in

8 m

16 m

24 m

32 m

55-A ball is thrown at the angle of 45' with the horizontal, then

The path of the ball is parabola and horizontal range is maximum

The path of the ball is parabola and horizontal range is minimum

The path of the ball is straight line and horizontal range is maximum

The path of the ball is semi-circle having maximum diameter

56-An object dropped from the window of a tall building hits the ground in 12.0 s. If its acceleration is 9.8 ms-2, the height of the window above the ground is

706 m

118 m

353 m

29.4 m

57-A book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book

90'

180'

60'

45'

58-A particle shows distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point

NONE

60-"No body begins to move or comes to rest of itself." is the anticipation of

Issac Newton

Galileo

Al khawarzmi

Abu Ali Sena

PHYSICS-Force and Motion (SMART INSTITUTE)

More Quizzes