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WorksheetsQUIZ- Work, Energy, Power
Total questions: 13
Worksheet time: 11mins
Which of the following is the unit of WORK.
Joule, J
Watt, W
Newton, N
Volt, V
ENERGY is defined as...
the rate of power
the ability to do work
the rate of work
the ability to generate power
A box is being pushed horizontally on an inclined surface by 15 N of force, in a distance of 3.5 m. Calculate the work generated by the 15 N or force?
52.5 Joule
60 Joule
55.5 Joule
59 Joule
Which of the following statements is true about WORK.
Work is a vector quantity
Work done can be positive or negative
Work have same unit as the energy
Work is done when a force is applied on object
Figure shows a 10 N force acting on a box. The box moves 5 m to the right. Calculate the work done by the force.
50 J
50 N
O J
5 J
A boy pulls a 30 kg box up a smooth plane inclined at 30o to the horizontal as shown in figure. If the length of the plane is 5 m, calculate the work done in pulling the box to the top of the plane.
1471.5 J
129.9 J
1274.36 J
735.75 J
Which statement is not true about Potential Energy?
The energy possessed by an object due to its position or state or location
Gravitational energy is a part of potential energy
Depends on the weight, height and gravitational field
The formula is
Ep = m.g.h
Which statement is true about Kinetic Energy?
The energy an object possesses due to the location
The formula is
Ek = 1/2mv
The Kinetic Energy of a moving object depends on its mass and velocity
The unit of Kinetic Energy is Newton
A ball is throw in the direction as shown in figure. At which point does the ball possess minimum kinetic energy.
R
Q
P
S
All the statements are true about Principle of Conservation Energy, except...
States that energy can neither be created nor destroyed, but can be converted from one form to another
Potential Energy + Kinetic Energy = 100% (Maximum Energy)
Potential Energy and Kinetic Energy is equal to each other
If the Potential Energy is at maximum, the Kinetic Energy is at minimum.
Which statement is not true about POWER?
Is a rate of work done in a unit of time
Is a rate of energy measure in a unit of time
The formula is
Power = Work/time
The unit of power is Watt, W
If 40 Watt of power dissipated for 30 min, how much work is done.
72000 J
7200 J
720000 J
720 J
Which formula is not related to Efficiency?
Efficiency = (Energy output/Energy input) x 100%
Efficiency = (Output work/Input work) x 100%
Efficiency = (Power output/Power input) x 100%
Efficiency = (Energy output/Power input) x 100%
