A cable with 22.0 N of tension pulls straight up on a 1.50 kg block that is init

Question

A cable with 22.0 N of tension pulls straight up on a 1.50 kg block that is initially at rest. What is the block's speed after being lifted 2.00 m? Solve this problem using work and energy.

Problem 10.40 - Enhanced - with Feedback Part A A cable with 22.0 N of tension pulls straight up on a 1.50 kg block that is initially at rest. What is the block's speed after being lifted 2.00 m? Solve this problem using work and energy Express your answer with the appropriate units. You may want to review ( pages 251-252) | u=| Value Units | Submlt My Answers Give Up Provide Feedback Continue

Explanation / Answer

initial kinetic energy=0
net force acting=22-1.50*9.8= 7.3 N

work done=force*displacement=7.3*2.0=14.6 J
let the velocity after 2.3 m=v
kinetic energy after 2.0 m=(1/2)*1.12*v2

work done =change in kinetic energy
14.6 =(1/2)*1.50*v2-0
v=4.41 m/s (ans)

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