Question

When you are carrying your backpack to class at a constant speed, you are not doing work. Why not

Answer 1

Hey dear

Here is your answer

• When you are carrying your backpack, You are applying force to your bag in upward direction.
• But, your displacement is in horizontal direction, making an angle between Force and displacement = 90°

Since, W = FS cos Theta

• theta = 90°
• Hence , cos 90 = 0 , then W = 0J
• Therefore, work done is zero

Answer 2

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