Forces

Question 1

equation linking force, distance and work fone

Answer 1

work done = force x distance

Question 2

what is Work Done measured in

Answer 2

Joules

Question 3

what is 1 joule equal to

Answer 3

1 joule = 1 newton metre

Question 4

how can energy be transferred

Answer 4

Energy can be transferred by mechanical work, electrical work, heating, or radiation

Question 5

examples of forces involved in stretching, bending and compressing an object

Answer 5

bending: compression and tension
stretching: elastic and tension
compressing: compression

Question 6

how can protective pads or something protective reduce injury

Answer 6

protective gear increases time taken to stop, so the rate of change of momentum decreases, reducing the force/impact on the person

Question 7

what is inertia

Answer 7

the tendency of an object to continue in its state of rest or motion

Question 8

how does high altitude affect air resistance

Answer 8

the higher the altitude, the less dense the air, so the air resistance decreases, so object will be able to accelerate for longer at a higher atlitude

Question 10

why are windows in an airplane curved/bended slightly

Answer 10

force from air pressure acting from inside to outside is bigger than force acting inwards, so window is kept in position