2: Mechanics

Question 1

What does the gradient of a displacement-time graph represent?

Answer 1

Velocity

Question 2

What does the gradient of a velocity-time graph represent?

Answer 2

Acceleration

Question 3

What does the area of a velocity-time graph represent?

Answer 3

Displacement

Question 4

What does the area of a acceleration-time graph represent?

Answer 4

Velocity

Question 5

What are examples of vector quantities?

Answer 5

Displacement
Velocity
Weight
Momentum
Force
Acceleration
Field Strength
Moment
Current

Question 6

What are examples of scalar quantities?

Answer 6

Distance
Speed
Mass
Energy
Temperature
Power
Volume

Question 7

Newton’s first law

Answer 7

A body remains at rest, or travels in a straight line at constant velocity, unless a resultant force acts upon it.

Question 8

Newton’s second law

Answer 8

In the presence of a resultant force a body experiences an acceleration.

Question 9

Newton’s third law

Answer 9

For every force that acts there is an equal force of the same type that acts in the opposite direction.

Question 10

What is the principle of conservation of linear momentum?

Answer 10

In a collision or explosion, the momentum before is equal to the momentum after when no external force acts.

Question 11

What is the principle of conservation of energy?

Answer 11

The total energy before and after a transfer is the same.
Energy cannot be created or destroyed, just transferred.