If the resultant force acting on a body is zero, what can be said about the body’s motion?
The body is stationary
The body is moving at a constant speed
The body could be stationary or moving at a constant speed
A force of 12 N acts to the left on a body and a force of 16 N acts to the right. What is the size and direction of the resultant force?
4 N to the right
28 N to the left
16 N to the right
Which word describes the forces on an object moving at a constant speed?
Resultant
Balanced
Unbalanced
If a resultant force acts on an object, what happens to its motion?
There is no change in speed
The object accelerates in the opposite direction to resultant force
The object accelerates in same direction as resultant force
Which of these statements about Newton's third law of motion is correct?
The forces are always contact forces
The forces act on the same object
The forces act on two different objects
Which of these is the best example of Newton’s third law in action?
A body accelerating when a resultant force is acting on it
Earth’s gravity attracting a hot air balloon and the hot air balloon’s gravity attracting the Earth
A body travelling in a straight line until a resultant force acts on it
A car of mass 1,450 kg accelerates at 2.8 m/s2. What is the resultant force acting on the car?
4,060 N
518 N
0.002 N
What is the relationship between acceleration and force?
Acceleration is directly proportional to force
Acceleration is inversely proportional to force
Acceleration is not proportional to force
What is the relationship between acceleration and mass?
Acceleration is directly proportional to mass
Acceleration is inversely proportional to mass
Acceleration and mass are not proportional
A resultant force of 54,000 N acts on a train of mass 18,000 kg. What is the acceleration of the train
0.3 m/s2
3.0 m/s2
72,000 m/s2