Force and motion

Question 1

contact force

Answer 1

they have to touch the object to experience the force

Question 2

non-contact force

Answer 2

they don’t have to touch the object to experience the force

Question 3

effects of forces

Answer 3

• change of speed
• change in direction
• change in shape

Question 4

balanced force

Answer 4

if the forces on an object are balanced, the object will remain stationary, or if the object is moving, it will continue to move at a constant speed

Question 5

mass

Answer 5

the amount of matter that makes up an object. the mass of an object is always the same

Question 6

weight

Answer 6

a force due to the pull of gravity on an object. the weight of an object varies

Question 7

calculation for weight

Answer 7

weight = mass x gravitational pull - W=MxG

Question 8

calculation for distance

Answer 8

distance = time x speed - D=TxS

Question 9

calculation for speed

Answer 9

speed = distance ÷ time - S=D÷T

Question 10

calculation for time

Answer 10

time = distance ÷ speed. T=D÷S

Question 11

speed

Answer 11

the average speed is the total distance