Forces

Question 1

What is a resultant force?

Answer 1

The combination of more than one force on an object.

Question 2

What is a Vector?

Answer 2

A quantity which has both direction and magnitude (OH YEAHHH)

Question 3

What is a Scalar?

Answer 3

A quantity which has magnitude but no direction.

Question 4

What are contact forces?

Answer 4

A force acting between objects physically touching.

Question 5

What are non-contact forces?

Answer 5

A force acting between objects that are not touching.

Question 6

Is weight a contact or non-contact force?

Answer 6

Non-contact.

Question 7

How is weight affected by the gravitational field strength?

Answer 7

The weaker the gravitational field strength, the smaller the weight.

Question 8

What is earth’s gravitational field strength?

Answer 8

9.8N/kg

Question 9

What is the equation for weight?

Answer 9

Weight (N) = mass (kg) x gravitational field strength (N/kg)

Question 10

What is Extension?

Answer 10

The increase in length.

Question 11

What is Compression?

Answer 11

The decrease in length.

Question 12

TRUE OR FALSE
Force on an object will not cause shape change.

Answer 12

FALSE
Force on an object may cause shape change.

Question 13

What is the equation for force (in springs)?

Answer 13

Force (N) = spring constant (N/m) x extension (m)

Question 14

What are examples of Scalar Quantities?

Answer 14

Temperature, speed, distance, etc.

Question 15

What are examples of Vector Quantities?

Answer 15

Displacement, velocity, acceleration, weight, etc.

Question 16

What is ‘centre of mass’?

Answer 16

The single point at which force is acting on an object.