Sir Isaac Newton’s Laws of motion describe how forces cause changes to the motion of an object, how gravity gives weight to mass; how forces cause acceleration and how forces work in collisions.
What can a force change?
Speed, shape and colour of an object
Speed, shape and direction of an object
Speed, shape and elements of an object
What unit is force measured in?
When an object is in motion, what direction does friction act in?
The same direction as the motion of the object
At right angles to the motion of the object
The opposite direction to the motion of the object
What are balanced forces?
Forces where the effect of one force is cancelled out by another
Forces where the effect of one force is larger than another
Forces measured using a Newton balance
What causes 'changing motion'?
What is Newton's Second Law?
The bigger the unbalanced force the bigger the acceleration
If A exerts a force on B, then B exerts an equal but opposite force on A
If a body is at rest and the forces acting on it are balanced then the body will remain at rest
Which statement best describes weight?
A measure of the amount of matter inside an object
A measure of any acceleration acting on an object
A measure of the force of gravity acting on an object
What unit is weight measured in?
Metres per second per second
What is the weight of an astronaut with a mass of on the moon? The gravitational field strength on the moon is .
What unbalanced force is acting on an object that has a mass of and is accelerating at ?
Compared to the force required to accelerate a mass, what force would be required to produce the same acceleration in a mass?