Speed

Question 1

What is speed

Answer 1

Speed is a measure of how fast something is going

Question 2

What is the formula to find speed

Answer 2

Speed=Distance/Time

Question 3

What is the unit used to measure speed

Answer 3

M/s

Question 4

What is Velocity

Answer 4

Velocity is the speed of an object in a given direction

Question 5

What is a decrease of velocity called

Answer 5

Deceleration

Question 6

What are the units of acceleration

Answer 6

M/s (squared)

Question 7

Types of contact forces

Answer 7

Thrust Drag Friction

Question 8

Types of Non-contact forces

Answer 8

Magnetism Gravity

Question 9

What is friction

Answer 9

Friction is a force that opposes the sliding motion of an object when in contact with another object.

Question 10

Advantages of friction

Answer 10

• Friction allows tyres to grip on a road.
• Friction allows brakes on a bike or car to work.
• Friction allows to walk on the ground without falling.
• Friction allows things to stay still on tables and chairs.

Question 11

Disadvantages of friction

Answer 11

• Friction causes blisters on our feet.

• Friction can cause parts of equipment to wear away such as the soles on your shoe.

• Friction can cause problems for planes or cars travelling very fast. They need to use more fuel to overcome friction with the air.

Question 12

How to reduce friction

Answer 12

Lubrication

Question 13

What is mass

Answer 13

Mass is how much matter or “stuff” is in something.

Question 14

What is used to measure mass

Answer 14

Mass balance

Question 15

What is weight

Answer 15

Weight is the force due to gravity that a mass pushes down on the Earth.

Question 16

What is weight measured by

Answer 16

Newtons

Question 17

Hookes law

Answer 17

Objects that change shape when forces are applied and removed are called elastic. Hooke’s law says that the extension of a spring is directly proportional to the force that is stretching it.