Edexcel IGCSE Physics 4.11 Work done equation
Practise using W = F x d to calculate work, force or distance, including ramps, ropes and forces acting along the movement.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- substitute force and distance into W = F x d, then give work done in joules
- rearrange W = F x d to calculate force, checking distance is in metres
- compare ramp steepness using the trade-off between lower force and longer distance
4.11 Work done equation question 1
A student uses this apparatus to investigate the force needed to pull a block along a ramp.
Question (a)
(a)
State the formula linking work done, force and distance moved in the direction of the force.
[ 1 ]
Question (b)
(b)
The student pulls the block 0.89 m along the ramp with a force of 26 N . Show that the work done on the block by the 26 N force is about 23 J .
[ 2 ]
Question (c)
(c)
The student suggests it is better to use a less steep ramp to raise the block through the same vertical height.
Discuss an advantage and a disadvantage of using a less steep ramp.
[ 4 ]
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