9 The amount of work done against friction to slide a box in a straight line across a uniform, horizontal floor depends most on the (1) time taken to move the box (2) distance the box is moved (3) speed of the box (4) direction of the box's motion

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please help with questions number 9,10,11,12,13,14, and 15
9 The amount of work done against friction to slide
a box in a straight line across a uniform,
horizontal floor depends most on the
(1) time taken to move the box
(2) distance the box is moved
(3) speed of the box
(4) direction of the box's motion
Transcribed Image Text:9 The amount of work done against friction to slide a box in a straight line across a uniform, horizontal floor depends most on the (1) time taken to move the box (2) distance the box is moved (3) speed of the box (4) direction of the box's motion
10 The diagram below shows two identical wooden
planks, A and B, at different incline angles. The
planks are used to slide concrete blocks from the
bed of a truck.
Truck bed
Compared to the amount of work done against
friction by a block sliding down plank A, the
work done against friction by a block sliding
down plank B is
(1) less
(3) the same
(2) more
11 A 95-kilogram student climbs 4.0 meters up a
rope in 3.0 seconds. What is the power output
of the student?
(1) 1.3 × 10² W
(2) 3.8 × 10² W
(3) 1.2 × 10³ Ww
(4) 3.7 × 10° W
12 What is the minimum power required for a
conveyor to raise an 8.0-newton box 4.0 meters
vertically in 8.0 seconds?
(1) 260 W
(2) 64 W
(3) 32 W
(4) 4.0 W
13 A weightlifter lifts a 200-kilogram mass a vertical
distance of 0.5 meter in 0.1 second. What is the
lifter's power output?
(1) 1 × 10-4 W
(2) 4 × 10-4 W
(3) 1 × 10 W
(4) 4 × 10 W
14 A 4.0 X 10°-watt motor applies an 8.0 x 10²-
newton force to move a boat at constant speed.
How far does the boat move in 16 seconds?
(2) 5.0 m (3) 32 m
(1) 3.2 m
(4) 80. m
15 A boat weighing 9.0 × 10' newtons requires a
horizontal force of 6.0 X 10ʻ newtons to move it
across the water at 1.5 X 10' meters per second.
The boat's engine must provide energy at the
rate of
(1) 2.5 x 102J
(2) 4.0 x 10' W
(3) 7.5 × 10 J
(4) 9.0 × 10³ W
Transcribed Image Text:10 The diagram below shows two identical wooden planks, A and B, at different incline angles. The planks are used to slide concrete blocks from the bed of a truck. Truck bed Compared to the amount of work done against friction by a block sliding down plank A, the work done against friction by a block sliding down plank B is (1) less (3) the same (2) more 11 A 95-kilogram student climbs 4.0 meters up a rope in 3.0 seconds. What is the power output of the student? (1) 1.3 × 10² W (2) 3.8 × 10² W (3) 1.2 × 10³ Ww (4) 3.7 × 10° W 12 What is the minimum power required for a conveyor to raise an 8.0-newton box 4.0 meters vertically in 8.0 seconds? (1) 260 W (2) 64 W (3) 32 W (4) 4.0 W 13 A weightlifter lifts a 200-kilogram mass a vertical distance of 0.5 meter in 0.1 second. What is the lifter's power output? (1) 1 × 10-4 W (2) 4 × 10-4 W (3) 1 × 10 W (4) 4 × 10 W 14 A 4.0 X 10°-watt motor applies an 8.0 x 10²- newton force to move a boat at constant speed. How far does the boat move in 16 seconds? (2) 5.0 m (3) 32 m (1) 3.2 m (4) 80. m 15 A boat weighing 9.0 × 10' newtons requires a horizontal force of 6.0 X 10ʻ newtons to move it across the water at 1.5 X 10' meters per second. The boat's engine must provide energy at the rate of (1) 2.5 x 102J (2) 4.0 x 10' W (3) 7.5 × 10 J (4) 9.0 × 10³ W
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