What are forces

Question 1

What are forces?

Answer 1

Pushes or Pulls

Question 2

What do you use to measure a force

Answer 2

A Newton meter (force meter)

Question 3

What is the unit of force called?

Answer 3

the newton, N

Question 4

Why does an astronaut weigh less on the Moon than on the Earth?

Answer 4

the force of gravity is weaker on the surface of the Moon than on the surface of the Earth.

Question 5

What is the weight of a 20 kg box on the Earth?

Answer 5

200N

Question 6

What is the pressure exerted by a man standing on one leg?

Answer 6

twice the pressure he exerts when standing on two legs.

Question 7

What happens to the air resistance on a car as the car goes faster?

Answer 7

As a car goes faster, air resistance increases.

Question 8

Friction …..

Answer 8

slows a moving object

Question 9

weight measured in

Answer 9

Newtons

Question 10

Speed =

Answer 10

distance/time

Question 11

On a distance - time graph a horizontal line means that the object is

Answer 11

Stationary

Question 12

The following are non-contact forces

Answer 12

gravitational force, magnetic force and static electricity.

Question 13

Balanced forces

Answer 13

produce no change in motion

Question 14

Unbalanced forces

Answer 14

produce a change of speed or direction

Question 15

Air resistance

Answer 15

is a kind of frictional force that slows things down.

Question 16

pressure =

Answer 16

force/area

Question 17

pressure is measured in

Answer 17

N/m2 or Pascals (Pa)