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MCQ Questions for CBSE Class 12 with Answers
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Work Power and Energy Class 11 MCQ Questions With Answers
1.
Energy from a compressed spring would be an example of...
kinetic
elastic
gravitational
chemical
2.
When a rollercoaster cart moves towards the ground, what happens to the PE that it has?
It transforms into KE
It leaves the system
Nothing
It stays PE
3.
In order for work to be done, what must be true?
Force acts in the same direction as the distance traveled.
Force and distance are in opposite directions.
Force is greater than distance.
Distance is greater than force.
4.
Based on the formula for potential energy, what 2 variables influence PE the most?
mass and height
mass and velocity
velocity and height
velocity and mass
5.
What is kinetic energy?
stored energy
energy of motion
energy of friction
energy stored in chemical bonds
6.
The Law of Conservation of Energy states that total amount of energy in a closed system will always
stay the same
increase
decrease
cannot be determined
7.
How do we express the total amount of energy a moving object has?
KE x PE
KE + PE
KE - PE
KE / PE
8.
In which situation is NO work done?
picking up a book bag
dropping the bookbag
carrying the bookbag
none of these
9.
What has to happen when a force is exerted on an object for work to be done?
the object moves
the object stays still
the object is heavy
none of these
10.
What is the formula for Kinetic Energy?
PE = m*g*h
KE = 1/2m*v2
W = F*d
P = W/t
11.
When you carry an object, is work done on it?
Yes, force is applied in the same direction as the distance it travels.
No, force is applied in a different direction than distance traveled.
12.
The SI unit of work is?
Joules
Watts
Newtons
meters
13.
If 150 Joules of work is needed to move a box 10 meters, what force was used?
1500 N
15 N
1.5 N
150 N
14.
What is the kinetic energy of a ball sitting on top of a hill?
0 J
less than 0 J
more than 0 J
15.
Why does the total amount of mechanical energy stay constant in a system?
energy is not created or destroyed
energy leaves
energy enters
energy is not converted from one form into another
16.
What is being transferred as you do work?
Energy
Heat
Power
Gravitational Potential Energy
17.
What is the formula for calculating the total amount of mechanical energy?
ME = KE + PE
KE = ME + PE
PE = KE + ME
ME = 1/2 mv2
18.
When a roller coaster cart falls towards the ground, what happens to its potential energy?
Increases
Decreases
Stays the same
Nothing
19.
What type of energy represents the sum of the KE and PE that a moving object has?
chemical energy
total mechanical energy
electromagnetic energy
electrical energy
20.
Gravitational potential energy depends on the ________ and ________ of the object.
Height and mass
Friction and movement
Mass and Movement
Height and Friction
21.
How do you calculate power?
P = W/t
P = E/t
P = w * t
P = bbq/chicken
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