4.1 Force, Mass And Weight

Question 1

What are the base units of mass

Answer 1

Kilograms, kg

Question 2

Define mass

Answer 2

The amount of matter an object contains

Question 3

Define weight and state its unit

Answer 3

The gravitational force acting on an object, newtons

Question 4

State the equation for force

Answer 4

F = m x a

Question 5

State the equation for weight

Answer 5

W = m x g

Question 6

How do you determine the weight of an object

Answer 6

Using a newtonmeter calibrated to show the gravitational force acting on an object in newtons

Question 7

Define 1 newton

Answer 7

The force required to accelerate a 1 kg object at 1 ms^-2

Question 8

Define net/resultant force

Answer 8

The sum of all the forces acting on an object

Question 9

Describe the motion of an object that has a net force of zero exerted on it

Answer 9

The acceleration is zero

Question 10

Explain what is meant by resolving a force in its horizontal and vertical directions

Answer 10

Finding the horizontal and vertical components of the force

Question 11

What is a normal contact force

Answer 11

The force exerted by a surface on an object WHICH ACTS perpendicularly to the surface