PHYS - Questions on Force and Motion
Physics, motion, force, acceleration - IBDP \ DSE | GCE | IAL | AP Physics
Let's take a look at some question on forces and motion from IGCSE Physics 😁
The graph shows part of a journey by a truck. The truck accelerates and then travels at constant velocity.
(a) Calculate the acceleration of the lorry during the first 6 seconds.
acceleration = gradient of velocity-time graph
= (14.8 - 6) / (6 - 0)
= 1.5 m/s2
(b) Calculate the distance traveled during the 8 seconds shown on the graph.
distance = area under velocity-time graph
= (area of trapezoid from 0 to 6 s) + (area of rectangle from 6 to 8 s)
= (1/2) x (6 + 14.8) x 6 + 14.8 x (8 - 6)
= 92 m
A car travels along a very busy road. The graph shows how the distance traveled by the car changes during a six minute period.
(a) Calculate the total amount of time the car is stationary during this period.
(b) Explain which stage of the graph, A, B, C, D or E, shows the car moving at the slowest speed.
(c) Calculate the speed of the car at stage C.
speed = distance moved / time taken = 200m / 60s = 3.3 m/s
The diagrams show the forces acting on four balls falling in air. Which diagram shows a ball decelerating as it falls?
The graph represents the motion of a cyclist at the start of an Olympic race.
(a) Calculate the initial acceleration.
acceleration = gradient of velocity-time graph = (15 - 0) / (2.4 - 0) = 6.25 m/s2
(b) Explain why the cyclist has to keep pedaling to maintain constant velocity.
(c) The photographs show cyclists and the winning times for the same event in two different Olympic Games. The designs of the cyclists’ clothing and their bicycles have changed. These changes have helped the modern cyclist to improve the winning time from 5 min 14 s to 3 min 51 s. Describe these changes and use scientific principles to explain how this change has helped cyclists improve the winning time.
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