Question

Help!!!! ill give u braillist and all if u do all of them!

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1. A man hits a golf ball (0.24 kg) which accelerates at a rate of 20 m/s2. What amount of force acted on the ball?

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

3.The wind pushes a paper cup along the sand at a beach. The cup has a mass of 25 grams (= ? kg) and accelerates at a rate of 5 m/s2. How much force (in Newton's) is the wind exerting on the cup?


4. 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.

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

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

7. A car whose mass is 1000kg is travelling at a constant speed of 10 m/s. Neglecting any friction, how much force will the engine have to supply to keep going at the same speed? (tricky question, think INERTIA, look at the units)

Answer 1

1. the 0.2 kg ball was hit with 4N of force, which caused it to accelerate 20 meters per second, per second.

2. Force = (mass x acceleration) = 18 x 3, = 54N.

3. So the force exerted by the wind on the paper cup is 0.125N

4. So the force exerted by me is 200N

5. you will need 280N of force

6. 88N

7. 0N

answers are in bold