Please help me I need help with this homework

Question

1) In order to receive credit for this worksheet you MUST show your work. 

2) You MUST write the applicable formula for each problem to receive credit.

3) You can use a calculator but you must show all of the steps.

1. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?

 

 

 

 

 

2. A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds?

 

 

 

 

 

3. A car advertisement states a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car’s average acceleration.

 

 

 

 

 

4. If a Ferrari, with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s/s for 3 seconds, what will its final velocity be?

 

 

 

 

 

 

5. A man hits a golf ball with a mass of 0.2 kg. His swing accelerates the ball at a rate of 20 m/s2. What amount of force acted on the ball?

 

 

 

 

 

 

6. You give a shopping cart a shove down the isle. The cart is full of groceries and has a mass of 18 kg. The cart accelerates at a rate of 3 m/s2. How much force did you exert on the cart?

 

 

 

 

7. The wind pushes a paper cup along the sand at a beach. The cup has a mass of 25 kg and accelerates at a rate of 5 m/s2. How much force is the wind exerting on the cup?

 

 

 

 

8. You push a friend sitting on a swing. She has a mass of 50 kg and accelerates at a rate of 4 m/s2. Find the force you exerted.

 

 

 

 

9. How much force would it take to push another, larger friend who has a mass of 70 kg to accelerate at the same rate of 4 m/s2?

 

 

 

 

10. A worker drops his hammer off the roof of a house. The hammer has a mass of 9 kg, and gravity accelerates it at the usual 9.8 m/s2. How much force does the earth apply to the hammer?

 

 

 

 

11. Your bicycle has a mass of 9.1 kilograms. You accelerate at a rate of 1.79 m/s2. Calculate the net force that is accelerating the bicycle. 

 

 

 

 

12. A runner has a mass of 89 kilograms. He produces a force of 84 Newtons between the ground and his running shoes. How fast does he accelerate? 

 

 

 

 

13. The Space Shuttle has a liftoff mass of 2,041,000 kg and accelerates at a rate of 16 m/s2. Calculate the force (thrust) accelerating the Space Shuttle. 

 

Answer 1

Hello, I know this was posted 13 days ago but I figured since no one else has responded, I will. Here is a formula to use.

Force = Mass x Acceleration

Newtons second law of motion.