
physics chapter 1
Quiz by Seemita Agarwal
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A body starts from rest and acquires a velocity V in time 'T'.The work done on the body in time't' will be proportional to
Which of the following statements is correct?
A man of mass 60 kg climbs up a 20 m long stair case to reach the top of a building, which is 10 m high. What is work done by him?
A car running at 25 km/h can be brought to rest by applyingbrakes at a distance of 0.5 m. If the car is running at 75 km/h, how far willit go before coming to rest, if the braking force remains the same?
A ball falls from a height of a 20 𝑚 and then bouncesback up to 10 𝑚 height.The loss of energy is:
A truck is 8 times heavier than a car and is moving at half the speed of the car. The amount of work done required to stop the truck as compared to the car is:
Which of the following remains constant for an isolated system?
Which of the following is the correct expression for work 'w',if is the force and is the displacementand angle between and is ?
An engine pumps out 40 kg of water in one second. The water comes out vertically upwards with a velocity of 3ms-1. What is the power of engine in kilowatt?
A body of mass M is lowered with acceleration g/2 with the help of a string and through a distance l. What is the work done by the string?
A girl of weight 400 N climbs up a rope through a height of 8m. The girl takes 20 s to accomplish this task. What is the power expended bythe girl?
A body is under the action of two equal and opposite forces,each of 3N and is displaced by 2 m. Which of the following is the value of workdone by the body?
Which of the following increases with rise in ball that isprojected upwards?
A bullet is fired into a block. Its velocity decreases by 50%,when it penetrates through 9 cm. What will be the total distance penetrated bythe bullet?
The force of attraction between two objects is called the______.
The magnitude of the momentum of a particle is increased by100%. If the initial kinetic energy is k, what will be the final kinetic energy?
A simple pendulum is vibrating in an evacuated chamber. Itwill oscillate with
What is the power developed by an engine in lifting water of3000 litre from a well 20 m deep in one minute?(1 litre water = 1000 Kg; g = 10m/s2)
A bomb of 12 kg explodes into two pieces of mass 4 kg and 8kg. The velocity of 8 kg mass is 6 m/s.What is the kinetic energy of the other mass?
What is the kinetic energy, if the momentum of a body is doubled?
The external force act required to maintain the circular motion of body towards the centre of circular path is ?
What is the value of gravitation potential energy of the bodyof mass 2 kg, which is projected vertically upwards with a speed of 3 m/s?
If we throw a body upwards with velocity of 4 ms-1,at what height does its kinetic energy reduce to half of its initial value?
If the mass of the body is halved and its speed is doubled, what happens to the kinetic energy of the body?
Two bodies A and B having masses m and M respectively possessthe same momenta. If M > m, and EA and EB aretheir kinetic energies, which of the following is true?
Which of the following statements are correct for frictional force?
(a)A frictional force acts in the direction of the motion ofthe object.
(b)Frictional force is a kind of contact force.
(c)It acts in opposite direction of the motion and parallel to the surface incontact.
(d)Frictional force is always a curse in the nature.
If a car with a mass of 1000 kg attains an acceleration of 5m/s2 in 5 seconds after the start, what will be the magnitudeof its momentum?
If a ball of 20 gm was brought to rest after covering a distance of 50 m moving at a speed of 50 m/s, what was the magnitude of this applied force?
Which of the following statements are correct?
(a)A force produces acceleration in the body on which it acts.
(b)A force can change the shape and size of an object.
(c)A force can change the total mass of an object.
(d)The S.I unit of force is Dyne.
How many dynes are there in force of magnitude 120 N?
A person is standing in a bus. When the bus starts movingforward suddenly ___________.
Which of the following forces balances a body kept on a table in the state of equilibrium?
Which of the following is correctly matched?
(a)Force: Newton
(b)Momentum: kg ms-1
(c) Acceleration: ms-1
(d)Torque: Joule
When we beat a carpet with a stick, then a cloud of dust is observed around it. Which of the following laws clearly explains this phenomenon?
On what factors does weight of an object depend?
(a) Mass of the object
(b) Size of the object
(c) Height of the object from ground
(d) Gravitational acceleration
A body is moving along a straight path. What will happen to the body in the absence of an external field?
Which physical quantity is defined as rate of change of momentum?
Which of the following pairs of forces are non-contact and repulsive in nature?
2 Nm is equal to
A body is in equilibrium if