Physics, 31.03.2020 18:32 brooklyn4682

1)Developing
Write Newton’s 2nd Law, using algebra, manipulate the equation to get the impulse/momentum equation.

2)An egg dropped on concrete will break when dropped from a short height while a second egg dropped from a greater distance will be safe it lands on a pillow. Explain why.

3)List three safety devices on a car and explain why they are effective using the impulse/momentum equation.

4)A 1000 kg car accelerates from 10 mph to 50 mph. By what factor does the momentum change?

5)Proficient
A bat exerts a 120 N force on a 0.134 kg baseball for 0.04 seconds. What impulse is exerted on the bat?

6)The second stage of a 100 kg rocket accelerates the rocket from 100 m/s to 480 m/s in 4 seconds. What is the change in momentum of the rocket? (Assume no loss of mass from burning fuel).

7)A 1400 kg car is pushed with a force of 100 N for 8 seconds. What is the change in velocity of the car?

8)A force of 10 N is applied to a box of unknown mass. The box is initially at rest is measured to have a velocity of 16 m/s after four seconds. What is the mass of the unknown box?

9)A 0.160 kg egg is dropped such that its velocity as it strikes the ground is 14 m/s. A high speed camera records the impact time of the egg as it smashes on the floor to be 20 ms. What is the force of impact?

10)The forces on a 2-kg book, initially at rest are graphed as a function of time shown below. Use the data below to answer the questions

10a)What is the impulse at 20 seconds?

10b)What is the velocity at 40 seconds?

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1)Developing
Write Newton’s 2nd Law, using algebra, manipulate the equation to get the impuls...

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