Problem Solving: Analyze and solve the given problems carefully. Write your answer in the space provided. Don't forget to put the unit of your final answer and round off your answer to the nearest hundredths. Example: 245671 J 456.50 J 67878.90 J 345.40 W
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1. Calculate the power output in watts of a 50 kg student who climbs a flight of stairs 5.7 m high in 7.3 s.
2.How much work is done if a force of 45.67 N moves an object to a distance of 9.3 m?
3.A 1320 kg car travels at 13.5 m/s. What is it kinetic energy?
4.A small electric motor is used to lift a 256 N water tank to a 5.7 m above the ground in 7.2 s. Calculate the power output of the motor.
5.A 15 kg rock rested on the top of the mountain at the height of 400.25 m. What is it potential energy?
NONSENSE ANSWER= REPORT
PLEASE KINDLY ANSWER IT CORRECTLY
1. Calculate the power output in watts of a 50 kg student who climbs a flight of stairs 5.7 m high in 7.3 s.
2.How much work is done if a force of 45.67 N moves an object to a distance of 9.3 m?
3.A 1320 kg car travels at 13.5 m/s. What is it kinetic energy?
4.A small electric motor is used to lift a 256 N water tank to a 5.7 m above the ground in 7.2 s. Calculate the power output of the motor.
5.A 15 kg rock rested on the top of the mountain at the height of 400.25 m. What is it potential energy?
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Answer:
1. The power of an object doing a work W in a given
time t is given by
where:
P = power
W = work
t = time
Solving for F
F = weight = mg
F = (50 kg)(9.8 m/s²)
F = 490 N
Solving for W
W = Fd
W = (490 N)(5.7 m)
W = 2,793 J
Solving for P
Therefore, the amount of power output is 382.6 W.
Yan lang po alam ko, hope it helps:)