Draw free body diagram for each and explain: 1) In figure below, A person is dra

Question

Draw free body diagram for each and explain:
1) In figure below, A person is dragging their suitcase along the ground at a constant speed v, as shown in the figure above. The coefficient of kinetic friction is Hu 0.5. Which of the following statements about the forces on the suitcase is true: a. the weight is less than the friction force. b. the friction force is greater than the pulling force (F) c. the normal force is less than the weight.
2)A hiker carries 10kg backpack on his back horizontally 100m across a field at constant speed of 2 m/s. How much work does he do on the backpack? ( why theta is 90 degree ) a. 0 J b. 500 J c. 100 J d. 200 j
3)A sedan is towing a minivan (that has run out of gas) with a rope. While the sedan is accelerating to highway speed: a. they two cars pull on one another with equal forces. b. the minivan is pulling harder on the sedan because it is acting a dead weight. c. the sedan pulls harder on the minivan than the minivan pulls on the sedan; otherwise there would be no acceleration. 2)A hiker carries 10kg backpack on his back horizontally 100m across a field at constant speed of 2 m/s. How much work does he do on the backpack? ( why theta is 90 degree ) a. 0 J b. 500 J c. 100 J d. 200 j
3)A sedan is towing a minivan (that has run out of gas) with a rope. While the sedan is accelerating to highway speed: a. they two cars pull on one another with equal forces. b. the minivan is pulling harder on the sedan because it is acting a dead weight. c. the sedan pulls harder on the minivan than the minivan pulls on the sedan; otherwise there would be no acceleration.

Explanation / Answer

here,

1)

for this question

when the applied force is above the horizontal

the normal reaction force acting , N = m * g - F * sin(theta)

c)

the normal reaction force is less than the weight

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