SP1- Motion

Question 1

Force

Answer 1

Force (N) = mass (kg) * acceleration (m/s2)

Question 2

Weight

Answer 2

Weight is a force that acts towards the centre of the earth

Question 3

Magnitude

Answer 3

Size

Question 4

Vector quantities

Answer 4

Quantities that have SIZE and DIRECTION

Eg. momentum, acceleration

Question 5

Mass

Answer 5

Measures the amount of matter in something. Does NOT have direction

Question 6

Scalar quantities

Answer 6

Quantities that have SIZE

Eg. distance, speed, energy, time

Question 7

Displacement

Answer 7

The distance covered in a STRAIGHT line
Has DIRECTION
(usually less than the distance travelled because there no turns or bends in the journey)

Question 8

Acceleration

Answer 8

A measure of how fast velocity is changing

Question 9

Momentum

Answer 9

A combination of mass and velocity

Question 10

Speed

Answer 10

How quickly something travels in a certain distance

Speed= distance/time

Question 11

Instantaneous speed

Answer 11

The speed at a particular point in a journey

Question 12

Light gates

Answer 12

R

Question 13

Distance/time graphs

Answer 13

Horizontal line= object is stationary

Straight, slopping lines= object travelling at a constant speed

Steeper the line, faster the object is travelling

Speed calculated by the gradient

Question 14

Gradient

Answer 14

R

Question 15

Acceleration (m/s2) calculation

Answer 15

change in velocity (v-u). (m/s)/ time taken (secs)

Question 16

Velocity/time graphs

Answer 16

Horizontal line= object travelling at constant velocity

Slopping line= object is accelerating

Steeper the line, the greater the acceleration

Negative velocity= shows the object moving in the opposite direction