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Force and motion Part 5: Law of conservation of linear momentum, Rocket motion, Elastic collision in one dimension
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- Question 1 of 20
1. Question
If momentum of a body is increased by 20%.What is the %increase in K.E of body?
CorrectIncorrect - Question 2 of 20
2. Question
A ball is thrown and after covering 5m distance it strikes a wall.After striking it moves back and cover 2m distance.What factor remains constant during this collision?
CorrectIncorrect - Question 3 of 20
3. Question
Which force is equal to rate of change of momentum for a freely falling body?
CorrectIncorrect - Question 4 of 20
4. Question
If a steel ball and a rubber ball strikes a man’s head .Which will exert more force?
CorrectIncorrect - Question 5 of 20
5. Question
If a car moves with initial momentum 15kgms-¹ .After applying 50N force the car gains 30kgms-1 momentum.How much time is required to bring this change?
CorrectIncorrect - Question 6 of 20
6. Question
A ball is moving with velocity 15ms-¹ .After some time due to friction it speed decreases to 5ms-¹ .This is an example of which system?
CorrectIncorrect - Question 7 of 20
7. Question
If a ball has mass 30 kg moving with velocity 50ms-¹collides with another ball which has also mass of 30 kg and moving with 80ms-1 speed..The collision is perfectly elastic.Whatvis the %loss in K.E of balls?
CorrectIncorrect - Question 8 of 20
8. Question
With what velocity gases are ejected from rocket’s tail in order to move up with greater speed?
CorrectIncorrect - Question 9 of 20
9. Question
Suppose water flows from a pipe at 3kgs-¹ and its velocity changes from 36kmh-¹ to zero.Whatbis the force exerted by water when it strikes the wall?
CorrectIncorrect - Question 10 of 20
10. Question
How many fuel is consumed by rocket per second?
CorrectIncorrect - Question 11 of 20
11. Question
After firing the Bullet the gun recoil backs to shoulder .This is occur bcz:
CorrectIncorrect - Question 12 of 20
12. Question
Find the value of speed for which momentum of a body is equal to its K.E:
CorrectIncorrect - Question 13 of 20
13. Question
Consider a car of mass 70kg moving with 30ms-¹ strikes a bike of 50 kg moving with 40ms-¹ After collision they began to move together.Find their velocity?
CorrectIncorrect - Question 14 of 20
14. Question
A heavier sphere of mass m1 moving with velocity v1 collides with a lighter sphere of m2 when m2 is at rest .What is the velocity of m2 after collision?
CorrectIncorrect - Question 15 of 20
15. Question
A ball is moving has momentum “mv” .After striking the wall it comes back.What is the change in momentum?
CorrectIncorrect - Question 16 of 20
16. Question
What is the formula to find %loss in k.E during inelastic collisions?
CorrectIncorrect - Question 17 of 20
17. Question
Consider water flows with speed 3 ms-¹ from a pipe of area 2m² .What is the force exerted by water on wall when water strikes it?
CorrectIncorrect - Question 18 of 20
18. Question
When a ball collides elastically with a stationary ball Of same mass.What occurs with its velocity?
CorrectIncorrect - Question 19 of 20
19. Question
Which is an approximately example of elastic collision?
CorrectIncorrect - Question 20 of 20
20. Question
What is the value of coefficient of restitution for perfectly elastic collision?
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