iGCSE Physics Forces Motion Energy

What are the units for mass

(a)  

The graph shows how the distance travelled by an aeroplane changes during part of its journey. Which is the formula linking average speed, distance moved and time taken.

• average speed = distance moved + time taken

• average speed = distance moved x time taken

• average speed = initial velocity² x time taken

• average speed = initial velocity² + final velocity²

• average speed = distance moved/time taken

The graph shows how the distance travelled by an aeroplane changes during part of its journey. Calculate the average speed of the aeroplane during this part of its journey, to the nearest whole number.

(a)  

Select all the correct answers. Mass =

• Weight x Gravitational field strength

• Weight / Gravitational field strength

• Force/ acceleration

• Force x acceleration

• Force/Weight

The graph represents the motion of a cyclist at the start of an Olympic race. Calculate the initial acceleration to 1 decimal place in m/s².

(a)  

When the velocity of the car is constant, the force of friction on it is

• zero

• greater than the driving force

• smaller than the driving force

• the same size as the driving force

A car now accelerates in a straight line.

Its average acceleration is 12 m/s².

Calculate the increase in velocity of the car in 4.0 s in m/s

(a)  

Which are the units for acceleration

• m/s

• m/s²

• s/m

• m/s³

When is the cyclist travelling with greatest velocity?

• for the first 15 seconds

• between 15 and 40 seconds

• between 40 and 50 seconds

• for the last 10 seconds

The graph shows a velocity-time graph for a cyclist over a time of 60 s .Calculate how long the cyclist is stationary for in seconds.

(a)