Player A is being pushed backward by an opposing player, Player B, who is exerting a force of 560 N on him. The weight of the Player A plus equipment is 833.0 N, and he is accelerating at 0.32 m/s² backward. What is the combined mass of Player A and his equipment? What is the magnitude of the force of friction between the Player A's feet and the grass? Sketch a free-body diagram of your system.

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Chapter4: Dynamics: Force And Newton's Laws Of Motion
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5.
Player A is being pushed backward by an opposing player, Player B, who is exerting a force of 560 N
on him. The weight of the Player A plus equipment is 833.0 N, and he is accelerating at 0.32 m/s² backward.
What is the combined mass of Player A and his equipment? What is the magnitude of the force of friction
between the Player A's feet and the grass? Sketch a free-body diagram of your system.
Possible answers for mass:
7.
(a) 57.14 kg
(b) 85.00 kg
8.
Possible answers for the frictional force:
(a) 266.56 N
(b) 273.00 N
6.
You are exerting a 32 N force while pushing a cart with your groceries. There is a 14 N frictional force
and the have a combined weight of the cart and your grocery is 125 N. Determine the mass and acceleration of
your cart. Sketch a free-body diagram of your system.
Possible answers for mass:
(a) 12.76 kg
(b) 79.00 kg
Possible answers for the acceleration:
(a) 0.01 m/s²
(b) 0.14 m/s²
Possible answers for (a):
(a) OJ
(b) 1.37 × 10³ J
Possible answers for (b):
(a) OJ
(b) 2.52 x 10³ J
(c) 266.56 kg
(d) 833.00 kg
(c) 532.80 N
(d) 587.20 N
A tow truck pulls a car 380 m along a roadway using a cable with a tension of 985 N.
(a) How much work does the cable do on the car if it pulls horizontally? (b) If it pulls at 37.0° with respect to the
horizontal?
(a) OJ
(b) 0.58 J
Possible answers for (b):
(a) 45.70 J
(b) 462.00 J
(c) 125.10 kg
(d) 1225.01 kg
(c) 1.41 m/s²
(d) 229.68 m/s²
(c) 3.74 × 10³ J
(d) - 3.74 x 10³ J
Ariane, a 56 kg skier, uses her poles to accelerate from rest to a speed of 6.01 m/s in 41.7 seconds. (a)
How much work was done upon the skier by use of the poles? (b) How much work was done upon the skier by
use of the poles if from her initial speed 6.01 m/s she sped up to 8.25 m/s?
Possible answers for (a):
(c) 2.99 × 10³ J
(d) 3.74 x 10³
(c) 24.25 J
(d) 1011.36 J
(c) 894.39 J
(d) 1905.75 J
Transcribed Image Text:5. Player A is being pushed backward by an opposing player, Player B, who is exerting a force of 560 N on him. The weight of the Player A plus equipment is 833.0 N, and he is accelerating at 0.32 m/s² backward. What is the combined mass of Player A and his equipment? What is the magnitude of the force of friction between the Player A's feet and the grass? Sketch a free-body diagram of your system. Possible answers for mass: 7. (a) 57.14 kg (b) 85.00 kg 8. Possible answers for the frictional force: (a) 266.56 N (b) 273.00 N 6. You are exerting a 32 N force while pushing a cart with your groceries. There is a 14 N frictional force and the have a combined weight of the cart and your grocery is 125 N. Determine the mass and acceleration of your cart. Sketch a free-body diagram of your system. Possible answers for mass: (a) 12.76 kg (b) 79.00 kg Possible answers for the acceleration: (a) 0.01 m/s² (b) 0.14 m/s² Possible answers for (a): (a) OJ (b) 1.37 × 10³ J Possible answers for (b): (a) OJ (b) 2.52 x 10³ J (c) 266.56 kg (d) 833.00 kg (c) 532.80 N (d) 587.20 N A tow truck pulls a car 380 m along a roadway using a cable with a tension of 985 N. (a) How much work does the cable do on the car if it pulls horizontally? (b) If it pulls at 37.0° with respect to the horizontal? (a) OJ (b) 0.58 J Possible answers for (b): (a) 45.70 J (b) 462.00 J (c) 125.10 kg (d) 1225.01 kg (c) 1.41 m/s² (d) 229.68 m/s² (c) 3.74 × 10³ J (d) - 3.74 x 10³ J Ariane, a 56 kg skier, uses her poles to accelerate from rest to a speed of 6.01 m/s in 41.7 seconds. (a) How much work was done upon the skier by use of the poles? (b) How much work was done upon the skier by use of the poles if from her initial speed 6.01 m/s she sped up to 8.25 m/s? Possible answers for (a): (c) 2.99 × 10³ J (d) 3.74 x 10³ (c) 24.25 J (d) 1011.36 J (c) 894.39 J (d) 1905.75 J
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