Forces and motion

Question 1

what is speed defined as?

Answer 1

distance travelled per unit time

Question 2

calculation of average speed with total time and total distance

Answer 2

average speed = total distance/ total time

Question 3

What is velocity?

Answer 3

speed in a given direction

Question 4

what is acceleration?

Answer 4

change in velocity per unit time

Question 5

speed in a given direction is described as…

Answer 5

velocity

Question 6

change in velocity per unit time is described as…

Answer 6

acceleration

Question 7

distance travelled per unit time is described as…

Answer 7

speed

Question 8

calculation of acceleration when theres a change in velocity and time taken

Answer 8

change in velocity/ time taken

Question 9

a vector has (2)…

Answer 9

magnitude and direction

Question 10

a scalar has a…

Answer 10

magnitude

Question 11

examples of scalars (4)

Answer 11

• distance
• speed
• time
• energy

Question 12

examples of vectors (4)

Answer 12

• displacement
• velocity
• acceleration
• force

Question 13

forces can change (3)

Answer 13

speed, shape or direction

Question 14

force is measured in?

Answer 14

Newtons (N)

Question 15

newtons first law

Answer 15

an object has a constant velocity unless acted on by resultant force

Question 16

newtons second law

Answer 16

force = mass x acceleration

Question 17

newtons third law

Answer 17

states every action force has equal and opposite reaction force

Question 18

example of newtons third law

Answer 18

force of the earths gravity on an object is equal and opposite to the force of the object gravity on earth

Question 19

calculation for weight when mass and gravitational field strength are involved

Answer 19

weight = mass x gravitational field strength

Question 20

what is the gravitational field strength on earth?

Answer 20

10N/kg

Question 21

slower reaction times are due to

Answer 21

alcohol, tiredness or distraction

Question 22

faster reaction time are due to

Answer 22

breaks working, thinking time and caffeine

Question 23

Hooke’s law

Answer 23

F = kx

Question 24

linear

Answer 24

straight line graph.

Question 25

non- linear

Answer 25

curved line

Question 26

equation for moment

Answer 26

moment = force x perpendicular distance from the pivot

Question 27

sum of clockwise moments is equal to…

Answer 27

the sum of anticlockwise moments and there is no resultant force

Question 28

momentum of an object is the product of its mass and velocity calculation

Answer 28

momentum = mass x velocity

Question 29

force exerted on an object is equal to…

Answer 29

its change in momentum over time

Question 30

in a collision, the total momentum before is equal to…

Answer 30

total momentum afterwards

Question 31

force calculation when change in momentum and time tskrn sre involved?

Answer 31

change in momentum/ time taken

Question 32

principle of the conservation of momentum is…

Answer 32

total momentum before = total momentum afterwards