Physics Year 10

Question 1

Discuss FORCES IN MOTION.

Answer 1

A force can either be a PUSH or a PULL acting on an object.

Hitting a ball = a Push force
Towing a car = a Pull force

Push & Pull forces can cause objects to speed up, slow down or change direction

Question 2

How is FORCE measured?

Answer 2

The size of a Force is measured in NEWTONS using a Force Meter.
Bathroom scales can also be used to measure Push forces. JUST MULTIPLY THE Kg BY 10 TO GET THE SIZE OF THE FORCE IN NEWTONS.

Question 3

What type of force is Gravity/weight?

Answer 3

Gravity /weight = a Force Field force as it needs no contact.

Question 4

What type of force is MAGNETIC?

Answer 4

Magnetic = a Force Field Force, as it needs no contact

N S -> N S {likes repel}

Question 5

Discuss push/thrust & pull

Answer 5

Can cause objects to speed up, slow down & change direction

Question 6

Discuss Friction/drag/resistance.

Answer 6

Friction is the force between 2 objects in contact with each other.
It causes moving objects to slow down.
It is a resistive force.
Friction always acts to oppose the motion of a moving object.

Question 7

Discuss Support

Answer 7

Always an arrow going up.

Eg someone sitting on a chair- the chair is supporting you.

Question 8

Discuss MASS & GRAVITY

Answer 8

MASS is measured in Kg. is a measure of how much matter you take up. Mass does not change no matter where you are.
GRAVITY is measured in NEWTONS & it takes 10N TO KEEP 1Kg ON EARTH.

If your mass is 60kg, the you weigh 600N.

Question 9

EQUATIONS.

SPEED =

Answer 9

SPEED = distance/time

V = d/t

Question 10

EQUATIONS.

DISTANCE =

Answer 10

DISTANCE = SPEED x TIME

D = V x T

Question 11

EQUATIONS.

TIME =

Answer 11

TIME = DISTANCE/SPEED

T = D/V