Motion And Energy

Question 1

Speed

Answer 1

Distance / time

Question 2

Difference between speed and velocity

Answer 2

Velocity is a speed in a certain direction

Question 3

Acceleration

Answer 3

Change in velocity / time

Question 4

Inertia

Answer 4

U inform motion

Question 5

Newton’s first law

Answer 5

Object stays at rest unless acted on by an unbalanced force

Question 6

Momentum

Answer 6

Mass x velocity

Question 7

Conservation of momentum

Answer 7

Cannot be created or destroyed

Question 8

Newton’s second law

Answer 8

Force = mass x acceleration

Question 9

Force =

Answer 9

Rate of change of momentum

Question 10

Weight

Answer 10

Mg

Question 11

Gfs

Answer 11

10N/kg

Question 12

Terminal velocity involves what forces

Answer 12

drag force of resistance

Gravitational pull

Question 13

Newton’s third law

Answer 13

Every action there is an equal and opposite reaction

Question 14

Work equ

Answer 14

Force x distance moved in direction of force

Question 15

Work done ?

Answer 15

Transfer of energy

Question 16

PotentiaL energy

Answer 16

Mgh

Question 17

What do crumple zones and road safety do

Answer 17

Decrease stopping distances

Question 18

Power =

Answer 18

Energy transfer / time

Question 19

Percentage efficiency

Answer 19

Useful output / input x 100