MCQ-3: NEET-Work, Energy and Power
There are twenty questions in this quiz. Select the correct answer from the given choices.
0 of 20 Questions completed
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
0 of 20 Questions answered correctly
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
Unfortunately, you have not scored the minimum marks required to pass the quiz. You may review the explanations provided below by clicking on the “View Questions” button before taking the quiz again. You need to score a minimum of 50% to pass, and minimum of 80% to get a Certificate of Completion.
Congratulations!!! You have passed the Quiz. To get a Certificate of Completion, you need to score a minimum of 80%. You may review the explanations provided below by clicking on the “View Questions” button before taking the quiz again. The more you review and practice, the better you will get at it.
Congratulations!!! You have passed the Quiz with a good score. To get a Certificate of Completion, you need to score a minimum of 80%. You may review the explanations provided below by clicking on the “View Questions” button before taking the quiz again. The more you review and practice, the better you will get at it. We have raised the bar because we want you to SUCCEED with brilliant scores.
Congratulations!!! You have passed the Quiz with an Excellent Score and are eligible to get a Certificate of Completion.
|Table is loading|
|No data available|
Question 1 of 20
1. Question1 point(s)
Two spheres travel along the same line with velocities u1 and u2. They collide and after collision their velocities are v1 and v22
Which collision is not elastic?
U1/ms-1 U2/ms-1 v1/ms-1 v2/ms-1 A 2 -5 -5 -2 B 3 -3 0 6 C 3 -2 1 6 D 5 2 3 6CorrectIncorrect
Question 2 of 20
2. Question1 point(s)
An object of mass 4.0kg moving with a speed of 3.0ms<sup>–1</sup> strikes a stationary object in an inelastic collision.
Which statement is correct?CorrectIncorrect
Question 3 of 20
3. Question1 point(s)
The graph shows how the momentum of a motorcycle changes with time.
What is the resultant force on the motorcycle?CorrectIncorrect
Question 4 of 20
4. Question1 point(s)
Two train carriages each of mass 5000 kg roll toward one another on a level track. One is travelling at 2.00ms–1 and the other at 1.00ms–1, as shown.
They collide and join together.
What is the kinetic energy lost during the collision?CorrectIncorrect
Question 5 of 20
5. Question1 point(s)
A resultant force causes a body to accelerate.
What is equal to the resultant force?CorrectIncorrect
Question 6 of 20
6. Question1 point(s)
A ship of mass 8.4 × 107 kg is approaching a harbour with speed 16.4 ms–1. By using reverse thrust it can maintain a constant total stopping force of 920000N.CorrectIncorrect
Question 7 of 20
7. Question1 point(s)
A tractor of mass 1000 kg is connected by a tow-bar to a trailer of mass 1000 kg. The total resistance to motion has a constant value of 4000 N. One quarter of this resistance acts on the trailer.
When the tractor and trailer are moving along horizontal ground at a constant speed of 6 ms–1,
what is the force exerted on the tractor by the tow-bar?CorrectIncorrect
Question 8 of 20
8. Question1 point(s)
The graph shows the variation with time of the speed of a raindrop falling vertically through air.
Which statement is correct?CorrectIncorrect
Question 9 of 20
9. Question1 point(s)
A tennis ball is dropped onto a table and bounces back up. The table exerts a force F on the ball.
Which graph best shows the variation with time t of the force F while the ball is in contact with the table?CorrectIncorrect
Question 10 of 20
10. Question1 point(s)
A resultant force of 10 N acts on a body for a time of 2.0 s.
Which graph could show the variation with time t of the momentum p of the body?CorrectIncorrect
Question 11 of 20
11. Question1 point(s)
A stationary body explodes into two components of masses m and 2m.
The components gain kinetic energies X and Y respectively.
What is the value of the ratio X/Y ?CorrectIncorrect
Question 12 of 20
12. Question1 point(s)
What is a reasonable estimate of the average gravitational force acting on a fully grown woman standing on the Earth?CorrectIncorrect
Question 13 of 20
13. Question1 point(s)
A molecule of mass m travelling at speed v hits a wall in a direction perpendicular to the wall. The collision is elastic.
What are the changes in the momentum and in the kinetic energy of the molecule caused by the collision?
change in momentum change in kinetic energy A 0 0 B 0 mv2 C 2mv 0 D mv2 0CorrectIncorrect
Question 14 of 20
14. Question1 point(s)
A child on a sledge slides down a hill with acceleration a. The hill makes an angle θ with the horizontal.
The total mass of the child and the sledge is m. The acceleration of free fall is g.
What is the friction force F ?CorrectIncorrect
Question 15 of 20
15. Question1 point(s)
A box of mass 8.0 kg rests on a horizontal rough surface. A string attached to the box passes over a smooth pulley and supports a 2.0 kg mass at its other end.
When the box is released, a frictional force of 6.0 N acts on it.
What is the acceleration of the box?CorrectIncorrect
Question 16 of 20
16. Question1 point(s)
What is the definition of the force on a body?CorrectIncorrect
Question 17 of 20
17. Question1 point(s)
Trolley X, moving along a horizontal frictionless track, collides with a stationary trolley Y. The two trolleys become attached and move off together.
Which statement about this interaction is correct?CorrectIncorrect
Question 18 of 20
18. Question1 point(s)
An astronaut throws a stone with a horizontal velocity near to the Moon’s surface.
Which row describes the horizontal and vertical forces acting on the stone after release?
horizontal force vertical force A constant constant B constant decreasing C zero constant D zero decreasingCorrectIncorrect
Question 19 of 20
19. Question1 point(s)
Newton’s third law of motion is often summarised as ‘Every action (force) has an equal and opposite reaction.’
A book rests on a table.
If the weight of the book is the ‘action’ force, what is the ‘reaction’ force?CorrectIncorrect
Question 20 of 20
20. Question1 point(s)
A ladder is positioned on icy (frictionless) ground and is leant against a rough wall. At the instant of release it begins to slide.
Which diagram correctly shows the directions of the forces P, W and R acting on the ladder as it slides?CorrectIncorrect