Understanding Speed, Velocity, and Acceleration

What does Newton's second law say about an object's acceleration?

• It will accelerate only if there is a balanced force.

• It will accelerate only if there is an unbalanced force.

• It will not accelerate under any force.

• It will accelerate only if it is moving upwards.

How is speed different from velocity?

• Speed includes direction, velocity does not.

• Speed is a vector quantity, velocity is not.

• Speed is a scalar quantity, velocity includes direction.

• Speed and velocity are the same.

What does a speedometer in a car show?

• Average speed

• Instantaneous speed

• Velocity

• Acceleration

What is acceleration?

• The rate of change of distance

• The rate of change of direction

• The rate of change of velocity

• The rate of change of speed

How do scientists use Newton's laws in real life?

• To improve cooking recipes

• To design better furniture

• To understand the motion of planets and design aircraft

• To create new musical instruments