How much work must be done on a 4.0kg frictionless trolley, to accelerate it from rest to a velocity of 5.0m/s?

It must firstly be noted that, in general, the work done on an object is equal to its gain in energy.The trolley has gained kinetic energy. This can be calculated using the formula: "KE = (1/2)mv^2" where 'm' is the mass of the object and 'v' is its new velocity, when accelerating from rest.The KE gained by the trolley = (1/2) m v^2                              = (1/2) x 4 x 5^2                              = 50 JSo the work done on the trolley is equal to 50J.

WW
Answered by Will W. Physics tutor

3071 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

Which are the forms of heat you know. Explain them briefly including an example


A plane is entering a turn, identify the main forces acting on it (including central forces)


Waves on the surface of water are transverse waves. State one other example of a transverse wave.


Describe the energy changes as electricity is produced in a fossil fuel station.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning