What is the unit of speed?
m/s
m/s2
N
How do you calculate speed?
Speed = distance + time.
Speed = distance x time.
Speed = \(\frac{distance}{time}\).
What is the speed of a car if it travels 63 m in 3 s?
0.048 m/s
21 m/s
189 m/s
A girl runs at a speed of 6.2 m/s for 12 s.
How far does she run?
74.4 m
18.2 m
0.52 m
How is speed found from a distance-time graph?
It is read from the vertical (y) axis.
It is the gradient of the line.
It is the area under the line.
If an object is at rest the forces acting on it are...?
Balanced
Unbalanced
Weak
When the resultant force on an object is zero, which of the following could describe its motion?
It has constant acceleration.
It has reached constant speed.
It has changing speed.
What is the unit of force?
kg
kgm/s
Find the resultant force that acts on a van of mass 2400 kg, if it accelerates at 3.5 m/s2.
0.0015 N
685.7 N
8400 N
A car has a mass of 1500 kg, and an engine that can deliver a force of 6000 N. Find the acceleration of the car.
0.25 m/s2
4 m/s2
25 m/s2
A boat travels through water at a constant velocity. The forward thrust of the engine is 350 N. What is the drag of the water?
0 N
350 N
700 N
Two forces act on an object. 12 N acts to the right and 5 N to the left. What is the resultant force?
17 N right
7 N right
7N left