Find the kinetic energy of a particle of mass moving at .
Answer and explanation
Correct answer: B.
- Step 1: .
- Step 2: J.
Answer
.
Why not the others: is what you get if you forget the factor . is what you get if you forget to square the speed. is what you get if you halve twice.
Practise more Applied Maths: Kinematics, Dynamics, Energy and Momentum.
Free questions with an explanation for every one, and full timed GCE Advanced Level (Sri Lanka) mock tests.
More Applied Maths: Kinematics, Dynamics, Energy and Momentum questions
- A particle is projected from level ground with speed at an angle to the horizontal…
- Two particles of masses and are connected by a light inextensible string over a smooth fixed pulley. Find the ac…
- A particle of mass lies on a smooth horizontal table, joined by a light string over a smooth pulley at the edge to a particle…
- Particles of masses , and are placed on a line at , and . Find the -coordinate of their centr…
- A particle of mass moves in a horizontal circle of radius at a constant speed of on the end o…
- A particle is projected from level ground with speed at an angle where . Find the g…