When you lift a bowling ball with a force of 95 N , the ball accelerates upward

Question

When you lift a bowling ball with a force of 95 N , the ball accelerates upward with an acceleration a. If you lift with a force of 105 N , the ball's acceleration is 2a

Part A

Find the weight of the bowling ball.

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On vacation, your 1400-kg car pulls a 500-kgtrailer away from a stoplight with an acceleration of 1.30 m/s2

Part A

What is the net force exerted by the car on the trailer?

Part B

What force does the trailer exert on the car?

Part C

What is the net force acting on the car?

Explanation / Answer

in first case

from Newton secona law net force on ball is sum of all forces

95 -w =ma ..(1)

in second case

from Newton secona law net force on ball is sum of all forces

105 -w =2ma ..(2)

By solving(1) and(2) we get

weight of bowling ball w = 85 N

.......................................

mc = 1400 kg , mt =500kg, a =1.3 m/s^2

PartA:

Force exerted by car on trailer F = 500*1.3 =650 N

PartB : Foe every action there is equal and opposite reaction. sp

Force exert by trailer on the car F =ma = 500*1.3 =650 N

Part C: F =mc*a = 1400*1.3

F = 1820 N

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