The diagram shows the variation in time of the force exerted on the ball as the ball came into contact with a spring. What was the average force that was exerted on the ball? Gievn area under the curve is 50 u n i t s

Change in momentum is given by impulse which in turn is given by the area under the curve. Given the area, the curve is 50 U n i t s so, ∆ p = 50 kg m s - 1 Average force is given by the rate of change of momentum. From the graph, we can say that the ball is in contact with the spring for 1 s . So, F = ∆ p t = 50 1 = 50 N

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The diagram shows the variation in time of the force exerted on the ball as the ball came into contact with a spring.

Estimate the magnitude of change in momentum (in $kg m s^{- 1}$ ) of the ball.

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Important Questions on Mechanics

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 81

The diagram shows the variation in time of the force exerted on the ball as the ball came into contact with a spring.

Question Image

What was the average force that was exerted on the ball?

Gievn area under the curve is $50 u n i t s$

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 82

Two masses of

2.0 k g

and

4.0 k g

are held in place, compressing a spring between them. When they are released the

2 k g

moves away with the speed of

3.0 m s^{- 1}

. What was the energy (in Joules) stored in the spring?

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 83

A rocket in space where gravity is negligible has a mass (including fuel) of

5000 kg

. It is desired to give the rocket an average acceleration of

15.0 m s^{2}

during the first second of firing the engine. The gases leave the rocket at the speed of

1500 m s^{- 1}

(relative to the rocket). Estimate how much fuel (in kg) must be burnt in that second?

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Exam-style questions>Q 1

Four cars race along a given race track starting at the same time. The car that will reach the finishing line first is the one with the largest_____.

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Exam-style questions>Q 2

A body that started from rest moves with constant acceleration in a straight line. After travelling a distance $d$ the speed of the car is $v$ . What is the distance travelled when the speed of the car was $\frac{v}{2}$ ?

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Exam-style questions>Q 3

A sphere falls through a liquid and eventually reaches terminal speed. Which graph shows the variation with time of the distance travelled by the sphere?

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Exam-style questions>Q 4

A steel ball of mass

m

is thrown vertically downwards with initial speed

u

near the Earth's surface. The rate of change of momentum of the ball as it falls is:

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Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Exam-style questions>Q 5

A lunar module is descending vertically above the lunar surface. The speed of the module is decreasing. Which is a free-body diagram of the force on the landing module?

The diagram shows the variation in time of the force exerted on the ball as the ball came into contact with a spring. Estimate the magnitude of change in momentum (in kg m s-1) of the ball.

Important Questions on Mechanics

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The diagram shows the variation in time of the force exerted on the ball as the ball came into contact with a spring.

Estimate the magnitude of change in momentum (in $kg m s^{- 1}$ ) of the ball.