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Question 1

What is the difference between weight and mass?

Answer 1

Mass is a measure of how much matter an object has. Weight is a measure of how strongly gravity pulls on that matter.

Question 2

What is the difference between a vector and a scalar quantity?

Answer 2

a scalar quantity is a quantity described by a magnitude only ( e.g 3cm) whereas a vector is a quantity that is described fully by both a magnitude and a direction. e.g 3miles north.

Question 3

What is the difference between displacement and distance?

Answer 3

Distance is a scalar quantity that refers to “how much ground an object has covered” during its motion. Displacement is a vector quantity that refers to “how far out of place an object is”; it is the object’s overall change in position.

Question 4

What is the difference between velocity and speed.

Answer 4

velocity is the speed with a direction whereas speed is just the unit with no direction.

Question 5

Define acceleration.

Answer 5

the rate at which an object changes its speed. It is calculated using the equation:
Acceleration = change in speed ÷ time taken.

Question 6

Define force.

Answer 6

A force can be a push or a pull.

Question 7

Define momentum.

Answer 7

the mass of an object multiplied by its velocity.

Question 8

Define energy.

Answer 8

the capacity of a physical system to perform work.

Question 9

what is the distance travelled equation?

Answer 9

distance travelled= average speed x time.

Question 10

what is the acceleration equation?

Answer 10

acceleration= change in velocity/ time taken.

Question 11

what is the force equation?

Answer 11

force= mass x acceleration.

Question 12

what is the weight equation?

Answer 12

weight= mass x gravitational strength.

Question 13

what is the momentum equation?

Answer 13

momentum= mass x velocity

Question 14

what is the change in gravitational potential energy equation?

Answer 14

change in gravitational potential energy = mass x gravitational strength x change in vertical height.

Question 15

what is the kinetic energy equation?

Answer 15

kinetic energy= 1/2 x mass x (speed) squared.

Question 16

what is the efficiency equation?

Answer 16

efficiency=
useful energy transferred by the device.
_____________________
total energy supplied to the device.

Question 17

what is the wave speed equation?

Answer 17

wave speed= frequency x wavelength.

Question 18

what is the other wave speed equation?

Answer 18

wave speed= distance
_________
time.

Question 19

what are the typical speeds for walking, running, cycling and travelling by car?

Answer 19

walking: 3.1 mph
running: 10-15 mph
cycling: 9.6 mph
travelling by car: 2.6 metres per second

Question 20

what does a greater gradient show you on a acceleration graph?

Answer 20

that there is a greater velocity. and that there i a faster acceleration.

Question 21

what does a horizontal line show you?

Answer 21

the object is travelling at a steady speed.

Question 22

how would you work out the acceleration from a distance time graph?

Answer 22

distance travelled
_______________
time

Question 23

what is the acceleration of free fall?

Answer 23

on earth it is 10 m/s downward.

Question 24

what is uniform acceleration?

Answer 24

if an object is accelerating at a constant speed.

Question 25

how do you calculate the distance travelled from a velocity time graph?

Answer 25

you calculate the area under the line of best fit. you can split it up into squares rectangles and triangles and use the area of those shapes formula.