Skip to content
MathsGenie logo
Open app

Course home

  1. IGCSE
  3. Physics Edexcel
  5. Question bank

Energy transfers

MediumHard
1234567891011121314151617181920212223242526272829303132
Question 6

An engineer tests the efficiency of a subscale electric winch used to pull a model explorer vehicle up a slope.

The following measurements are recorded:

  • Current in winch motor: 2.5 A2.5\text{ A}2.5 A
  • Voltage across winch motor: 8.0 V8.0\text{ V}8.0 V
  • Time taken to pull the vehicle: 10.0 s10.0\text{ s}10.0 s
  • Pulling force exerted by the winch: 26 N26\text{ N}26 N
  • Distance the vehicle is pulled: 5.0 m5.0\text{ m}5.0 m
a.

Calculate the electrical energy supplied to the winch motor during this time.

[2]
b.

State the equation linking work done, force, and distance moved.

[1]
c.

Calculate the work done on the vehicle.

[2]
d.

State the useful energy transferred to the vehicle.

[1]
e.

State the equation linking efficiency, useful energy output, and total energy input.

[1]
f.

Calculate the efficiency of the winch motor.

[2]

Energy transfers Questions

  1. IGCSE
  2. /Physics
  3. /Energy transfers