Forces

Question 0

Force meters measure the size of a force in…….

Answer 0

Newtons (N)

Question 1

Pushing, pulling twisting and squeezing are examples of…….

Answer 1

Forces

Question 2

Forces can change the size or ……… of an object. They can change the …………. an object or change the …………………. of a moving object.

Answer 2

Forces can change the size or shape of an object. They can change the speed an object or change the direction of a moving object.

Question 3

What do we call the force when two things rub together?

Answer 3

Friction

Question 4

How can friction be reduced?

Answer 4

Lubrication

Question 5

Why do things have weight?

Answer 5

Because of the pull of gravity

Question 6

What do we call things that have little air resistance

Answer 6

Streamlined

Question 7

When something floats the upthrust is equal to its weight the two forces are ………………………

Answer 7

Balanced

Question 8

A boat floats higher in sea water than in freshwater why?

Answer 8

Sea water is denser

Question 9

What we call a lever that lifts a large load using a small effort

Answer 9

A force magnifier

Question 10

Give an example of a leaver used as a force magnifier

Answer 10

Your arm, the hand on the clock, a pedal bin.

Question 11

Besides a lever, what other machine can make lifting easier.

Answer 11

A pulley

Question 12

You push something with a force of 5N and the force of friction is 2N. What is the resultant force

Answer 12

3N

Question 13

If a push force is equal to the friction force, what can you say about the movement of an object?

Answer 13

It does not move. or if it is moving already, it keeps moving at the same speed. This is because there is no resultant force

Question 14

An athlete runs 15 m in five seconds what is the athletes average speed during the race

Answer 14

10 m/s