Forces

A resultant force of 4.0N acts on an object of mass 0.50 kg for 3.0 seconds.

What is the change in velocity caused by this force?

• 4.0 m / s

• 6.0 m / s

• 12 m / s

• 24 m / s

What is the moment acting on the seesaw?

• 1.6Nm
• 15Nm
• 16N
• 4Nm

When the velocity of the car is constant, the force of friction on it is

• zero

• greater than the driving force

• smaller than the driving force

• the same size as the driving force

Which are the units for acceleration

• m/s

• m/s²

• s/m

• m/s³

The cyclist accelerates at 1.4 m/s².

The mass of the cyclist and bicycle is 60 kg.

Calculate the resultant force.

Name two quantities that are vectors.

• force and speed
• speed and acceleration
• force and acceleration
• mass and weight

What are balanced forces?

• forces of the same size, in opposite directions
• the same size in the same direction
• forces in opposite directions
• forces at right angles to each other

What is the name for a single force on an object with the same effect as all the forces combined?

• big
• total
• resultant
• sum

Is the car

• Stationary
• Moving at constant speed
• Accelerating
• Decelerating

Is the car

• Stationary
• Moving at constant speed
• Accelerating
• Decelerating