#1
If a force of 50 Newtons is applied to move an object a distance of 5 meters, what is the work done?
250 Joules
ExplanationWork done is the product of force and displacement.
#2
A machine does 1000 Joules of work in 10 seconds. What is the power of the machine?
100 Watts
ExplanationPower is calculated by dividing work by time.
#3
Which of the following units is used to measure work in the International System of Units (SI)?
Joule
ExplanationWork is measured in joules in the SI unit system.
#4
Which of the following statements correctly describes power?
The rate at which work is done or energy is transferred
ExplanationPower represents the rate of work or energy transfer.
#5
What is the unit of power in the International System of Units (SI)?
Watt
ExplanationPower is measured in watts in the SI unit system.
#6
What is the formula for calculating work done?
Work = Force × Distance
ExplanationWork equals force multiplied by displacement.
#7
Which of the following statements accurately describes power?
Power is the rate at which work is done or energy is transferred
ExplanationPower represents the rate of work or energy transfer.
#8
Which of the following is a correct definition of work in physics?
The exertion of force over a distance resulting in displacement
ExplanationWork involves applying force over a distance to cause displacement.
#9
Which of the following formulas correctly represents the calculation of power?
Power = Work / Time
ExplanationPower is defined as the rate of doing work.
#10
A force of 20 Newtons is applied to lift a box weighing 100 kilograms. If the box is lifted a distance of 5 meters, what is the work done?
5000 Joules
ExplanationWork is the product of force and displacement.
#11
What happens to the power required if the time taken to do a certain amount of work is increased?
Power decreases
ExplanationAs time increases, power required decreases.
#12
In which of the following situations is work done by a force?
Lifting a box from the floor to a shelf
ExplanationWork is done when force causes displacement.
#13
What is the work done if a force of 30 N is applied to move an object a distance of 8 meters horizontally?
240 J
ExplanationWork is calculated as force times the horizontal displacement.
#14
If a car engine exerts a force of 5000 N to travel at a constant speed of 20 m/s, what is the power output of the engine?
10,000 W
ExplanationPower output is calculated using force and velocity.
#15
Which of the following statements is true regarding power and work?
Power and work are directly proportional
ExplanationPower and work exhibit a direct proportionality.
#16
Which of the following scenarios represents the highest power output?
Lifting a 15 kg object to a height of 1 meter in 3 seconds
ExplanationHigher power output involves accomplishing work in less time.