P1

Question 1

What is used to measure very small distances?

Answer 1

micrometer screw gauge

Question 2

Speed formula

Answer 2

total distance / total time

Question 3

Define acceleration

Answer 3

change of velocity / total time

Question 4

Acceleration is the…

Answer 4

gradient of a speed-time graph

Question 5

Acceleration of a free fall g for a body near to the Earth is _________.

Answer 5

constant

Question 6

What do you calculate to find the distance travelled for motion with constant acceleration.

Answer 6

the area under a speed–time graph

Question 7

Define speed

Answer 7

a measure of how fast an object is moving

Question 8

Earth is the source of a ___________________.

Answer 8

gravitational field

Question 9

Define weight

Answer 9

W=mg

g=10N/kg

Question 10

Define mass

Answer 10

m=W/g

Question 11

The mass of a body is the _____________ in it, whereas the weight of a body is the _____________________ acting on it.

Answer 11

amount of matter, measurement of gravitational force

Question 12

Define velocity

Answer 12

speed in a specific direction

same formula as speed but uses + and - signs to identify whether it is accelerating or decelerating

Question 13

When something speeds up/slows down, it is:

Answer 13

accelerating/decelerating

Question 14

3 fundamental effects of force

Answer 14

change in shape, size, motion(velocity)

Question 15

Newton’s 2nd law of motion:

Answer 15

Resultant Force applied =
Mass of object X acceleration of object

F(N) = m(kg) x a(ms^-2)

Question 16

Force applied is _________________ to the extension of the spring.

Answer 16

directly proportional

Question 17

Hooke’s Law

Answer 17

F = kx

Question 18

What does ‘k’ represent in the Hooke’s law formula?

Answer 18

spring content

Question 19

Elastic limit

Answer 19

spring no longer goes back to its original length - beyond this limit, the object will behave like plastic.

Question 20

What is this formula used for?
p=m/v

Answer 20

density

Question 21

Air resistance is a form of __________.

Answer 21

friction

Question 22

Define friction

Answer 22

the force between two
surfaces which impedes motion and results in
heating.

Question 23

The turning effect of a force depends on applying a force…

Answer 23

1. at 90 degrees to the hige/pivot
2. as far from the hinge as possible

Question 24

Define moment

Answer 24

the turning effects of a force

Question 25

Moment formula

Answer 25

Force perpendicular to the hinge x perpendicular distance from pivot moment(Nm) = F(N) x d(m)

Question 26

What is the gravity of Earth?

Answer 26

10N/kg

Question 27

Centre of mass

Answer 27

the point through which the weight appears to act.

Question 28

How to find the centre of mass of regular-shaped objects:

Answer 28

1. draw 2 lines of symmetry 2. where the lines cross = centre of mass

Question 29

Pressure formula

Answer 29

P(N/m^2) = F(N) / A(m^2)

Question 30

Unit for pressure

Answer 30

(Pa)Pascal