Calculate the power output in watts and horsepower of a shot-putter who takes 1.10 s to accelerate the 7.27 kg shot from rest to 12.0 m/s, while raising it 0.940 m. (Do not include the power produced to accelerate his body.)   Answer: power in watts______________ W   Answer: power in horsepower__________________ hp

88.

A transport truck driving at a constant speed of 82.0 km/hr on a flat stretch of highway must produce 2,634 N of force to overcome rolling friction and air resistance.  How much horsepower is required from the engine under these conditions ?  Ignore any mechanical losses in the drivetrain. {1 hp = 746 W}

P1

Power of the Human Heart. The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood. Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to 1.5 m. The density (mass per unit volume) of blood is 1050 kg/m3 . What is the heart's power output. Use g = 9.8m/s2 Calculate answer to one decimal.

Fill in the blank: Calculate the work done by these forces. A 10.0 N force is applied to push a block across a friction free surface for a displacement of 5.00 m to the right. Work = (note that your answer must have three significant figures to be marked correct.) Fnorm-20 N Fapp=10 N %3D Fgrav =20 N

A 2000 kg car with a 250 HP (1.865 X 105 W) engine accelerates from rest. If all the engine’s power is used to change the car’s speed during the entire trip, how much time does it take for the car to reach 100 mph (44.7 m/s)? Group of answer choices 10.7 s 4.81 s 6.78 s 15.1 s

please help with questions 20,21, and 22

Person A and Person B are both using the same amount of work to lift something.  Person A takes half as much time to do it. Using the formula for power, explain which person has the most Power and why.

With a starting velocity of 2 m/s to the right, you drag a 30.0 kg box for 4 meters. Your force is 200.0 N and the box's final velocity is 1.15 m/s to the right. Friction does -840 J of work.  What is the force of friction?