Which of the following answers contains two scalar quantities and one vector quantity?
Temperature, displacement, force
Momentum, velocity, acceleration
Mass, displacement, time
A boy walks for \(5km\) along a direction \(53^{\circ}\)West of North.
Which of the following journeys would result in the same displacement?
\(4km\) North followed by \(3km\) West
\(3km\) North followed by \(2km\) West
\(3km\) North followed by \(4km\) West
During a rugby match, a spectator at A walks to C, the opposite corner of the ground, by walking from A to B to C as shown in the diagram.
The distance from A to B is \(70m\). The distance from B to C is \(160m\). What is the final displacement of the spectator?
\(175m\) at 66 degrees East of North
\(210m\) at 72 degrees East of North
\(228m\) at 66 degrees East of North
If the spectator takes \(100 s\) to complete the walk, what is the average speed?
\[1.75\,m\,s^{-1}\]
\[2.3\,m\,s^{-1}\]
\[4.6\,m\,s^{-1}\]
If the spectator takes \(100 s\) to complete the walk, what is the size of the resultant velocity?
At lift-off, a space rocket has an engine force of \(45\, 000\: N\). The weight of the rocket is 38 000 \(N\). The resultant force on the rocket is?
\(83, 000N\) upwards
\(7,000N\) upwards
\(7,000N\) downwards
A car travels \(200m\) in \(10s\). What is the average speed of the car?
\[20\,m\,s^{-1}\]
\[210\,m\,s^{-1}\]
\[2000\,m\,s^{-1}\]
A runner travels at a speed of \(8\,m\,s^{-1}\).
How long will it take to run one lap of a \(400m\) track?
\[3,200s\]
\[408s\]
\[50s\]
A motor cyclist travelling at \(20\,m\,s^{-1}\) passes through a ‘speed detector’ on a motorway in a time of 0·15 seconds.
How far does the motor cyclist travel in this time?
\[133m\]
\[3\cdot 0m\]
\[30m\]