I have some Struggle with physics problem need some one to help me ,

I’m trying to learn for my Physics class and I’m stuck. Can you help?

1- Jayden selects up a heavy barbell and

  1. Lifts it to chest height
  2. Holds it steady for 1 minute
  3. Puts it gently back on the floor.

Rank the amounts of work Jayden performs during this three operations.

Label the quantities as W1, W2, and W3. Justify your ranking order.


Part A

Estimate the kinetic energy of your car as you are driving down the highway. (If you don’t own a car, you are helping the environment, in this case, estimate for someone else’s!) Of course, you will need to estimate values of the mass and velocity of the car. Explain these and any other assumptions you make.


Part A

One farmer is bragging about how strong his horse is. Another farmer says that his horse is more powerful. How would you rephrase these statements using careful physics terminology? What is really the difference between the two horses?

4- Diego pulls a box along the floor using a rope. The rope makes a 30 degree angle with the horizontal, and he pulls with a force of 20 N. Over the course of 5 seconds, he drags the box 3 meters. How much work does Diego do on the box?


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