Newton's laws homework

1, Which word describes the forces on an object moving at a constant speed?

• Resultant
• Balanced
• Unbalanced

2, If a resultant force acts on an object, what happens to its motion?

• There is no change in speed
• The object accelerates in opposite direction to resultant force
• The object accelerates in same direction as resultant force

3, Which of these statements about Newton's Third Law of motion is correct?

• The forces are always contact forces
• The forces always act on the same object
• The forces act on two different objects

4, Why might an air track be used in the acceleration experiments?

• To reduce friction
• To ensure the glider travels in a straight line
• To be able to attach the pulley

5, Which of these is not a hazard in the acceleration experiments?

• Burns from hot apparatus
• Electrical fault with the equipment
• Masses falling to the floor

6, 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

7, What is the correct equation for calculating weight?

• W = m ÷ g
• W = g ÷ m
• W = m g

8, What is the relationship between the weight of a body and the gravitational field strength?

• Weight is directly proportional to gravitational field strength
• Weight is inversely proportional to gravitational field strength
• Weight is not proportional to gravitational field strength

9, What is the acceleration of a 420 g object subject to a 15 N resultant force?

• 0.036 m/s2
• 36 m/s2
• 6,300 m/s2

10, Higher tier. What is the definition of inertial mass?

• The ratio of force over acceleration
• The effect of gravitational attraction on a weight
• The weight of an object in deep space, very far from any gravitational fields