Edexcel Combined Science P1 - Forces and Motion

Check all the vector quantities.

• Mass

• Velocity

• Force

• Weight

• Time

A brick has a mass of 0.4kg. What is its weight?

• 0.4kg

• 4N

• 40Nm

The gravitational field strength on earth is:

• Less than the gravitational field strength on the moon

• 9.8 N

• 9.8 N/kg

What is the best way to describe 'resultant force?'

• The average of all the forces on a body

• The single theoretical force that equates to all of the actual forces acting on a body

• A Jedi thing

What is the resultant force on this truck?

• 20N

• 60N

• 20N to the right

• 60N to the left

What does Newton's first law say about a body on which a resultant force acts?

• It will continue at constant speed

• It must be stationary

• It will accelerate

From A to B, a car's engine provides a forward force of 200N. The drag force on the car is 100N.

From B to C, the drag force remains the same, but the forward force decreases to 180N.

Which of the following statements is correct?

• From A to B the car is accelerating.

  From B to C the car is at constant speed.

• From A to B the car is accelerating.

  From B to C the car is decelerating.

• From A to B the car is accelerating.

  From B to C the car is still accelerating but at a lower rate of acceleration.

When a skydiver reaches terminal velocity, that means that....

• Her acceleration is 9.8 m/s/s

• Her weight is equal to her air resistance and her acceleration is zero

• Air resistance is high, weight is low

• Her weight is zero

Check all the non-contact forces.

• Gravity

• Air resistance

• Friction

• Magnetic attraction

• Electrostatic repulsion

Work done is....

(2 correct answers)

• Similar to energy, measured in Joules

• Equal to force x the distance over which the force is acting on a body

• Another measure of power

• Measured in kW.