S4 - Physics Test (3)

Question 1

What are the 2 types of quantities in physics?

Answer 1

Scalar & Vector

Question 2

What is the definition of ‘Scalar’?

Answer 2

A quantity that has magnitude only

Question 3

What is the definition of ‘Vector’?

Answer 3

A quantity has both magnitude and direction

Question 4

What are examples of scalar quantities?

Answer 4

• Distance
• Speed
• Time
• Energy
• Temp.
• Mass

Question 5

What are examples of vector quantities?

Answer 5

• Displacement
• Velocity
• Acceleration
• Force

Question 6

What is the definition of acceleration?

Answer 6

The rate at which the speed of an object changes over time

Question 7

What 2 things does acceleration depend on?

Answer 7

• How much the speed changes
• How much time the change in speed takes

Question 8

What does it mean when an object is at rest?

Answer 8

It’s speed is 0m/s

Question 9

When will acceleration have a negative answer?

Answer 9

When an object is slowing down (decelerating)

Question 10

What is acceleration measured in

Answer 10

m/s/s

Question 11

What are forces measured in?

Answer 11

Newtons (N)

Question 12

What 3 things can force do to an object?

Answer 12

Change its: speed/shape/direction

Question 13

What are the 2 types of forces?

Answer 13

Contact and non-contact

Question 14

What is a contact force?

Answer 14

A force that has to touch the object to affect it

Question 15

What is a non-contact force?

Answer 15

A force that does not have to touch the object to affect it

Question 16

Name the types of contact forces?

Answer 16

Push, pull, friction, tension & spring force

Question 17

Name the types of non-contact forces?

Answer 17

Gravity & magnetism

Question 18

What is friction and what direction does it act in to an object?

Answer 18

An opposing force, acts in the opposite direction of motion

Question 19

What direction does weight always act in?

Answer 19

Down

Question 20

What is weight and what is it measured in?

Answer 20

A measure of gravity’s pull on an object (a force) newtons (N)

Question 21

What is mass and what is it measured in?

Answer 21

A measure of how much ‘stuff’ an object is made up of, Kg

Question 22

What does newton’s third law talk about?

Answer 22

How every action (object) has an equal but opposite reaction (force)

Question 23

What does newton’s first law talk about?

Answer 23

Balanced forces - when 2 or more forces acting on an object are equal in size but opposite in direction

Question 24

What does newtons second law talk about?

Answer 24

Unbalanced forces - when 2 or more forces acting on an object are not equal in size or are not opposite in direction

Question 25

What happens when a balanced force acts on an object?

Answer 25

Remains stationary / continues to travel at a constant speed