Force Motion And Energy

Question 1

What is force?

Answer 1

A push, pull, or a twist

Question 2

What is mass?

Answer 2

Amount of matter (kg)

Question 3

What is weight?

Answer 3

Force due to gravity (N)

Question 4

What is distances measured in?

Answer 4

Meters (m)

Question 5

What is mass measured in?

Answer 5

Grams (g)

Question 6

What is force measured in?

Answer 6

Newtons (N)

Question 7

What is velocity measured in?

Answer 7

Metres per second (ms-1)

Question 8

What does friction produce?

Answer 8

Heat which warps metals

Question 9

How do we reduce friction?

Answer 9

Lubricants like oils and bearings

Question 10

Speed increases from 5 to 20ms-1 in 5 seconds

Calculate acceleration?

Answer 10

20-5/5=15/5=3ms-2

Question 11

A 1200kg car accelerates 5ms-2

Calculate force?

Answer 11

1200x5=6000n

Question 12

How do we calculate the net force?

Answer 12

Subtract the smaller force from the larger in the other direction.

Question 13

What is my weight if my mass is 70kg?

Answer 13

700N

Question 14

What is the rule of energy conservation?

Answer 14

Energy cannot be created or destroyed; it is simply changed from one form to another.

Question 15

What are the two types of energy?

Answer 15

Stored (potential) energy and active energy

Question 16

What are some examples of stored (potential) energy?

Answer 16

Chemical potential, gravitational potential, elastic potential

Question 17

What are some examples of active energy?

Answer 17

Kinetic, light, heat, sound, electrical, magnetic nuclear solar

Question 18

What is the energy transformation for a car?

Answer 18

Chemical —> kinetic —> heat and sound

Question 19

What is the energy transformation for a dam?

Answer 19

Gravitational —> kinetic —> electrical potential