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How is a particle moving in circular motion accelerating but not varying speed?

When a particle moves in circular motion, the resultant centripetal force acts radially towards the centre of the circle. Since there is a force there must be an acceleration on the particle due to Newtons 2...
MS
Answered by Max S. • Physics tutor
4651 Views

A box is pulled with a rope at 26° to the horizontal and a tension of 120N. What is the work done in pulling it 5 metres?

Work done = Force in direction of motion (horizontal in this case) x distance. Force in direction of motion is 120 x cos(26) (draw a diagram to help visualise this) and distance is 5. Therefore work done is ...
AR
Answered by Alice R. • Physics tutor
5422 Views

What are the different classifications of sub-atomic particles?

Firstly, particles can be split up into to main categories: hadrons and leptons. Hadrons interact with the strong force and are made of quarks. Leptons don't interact with the strong force and are fundamenta...
JB
Answered by Jordan B. • Physics tutor
2323 Views

In one second a mass of 210 kg of air enters at A. The speed of this mass of air increases by 570 m s–1 as it passes through the engine. Calculate the force that the air exerts on the engine.

F = M x A (A= (V-U)/T) F = 210 x 570 F = 119,700 N
SG
Answered by Sam G. • Physics tutor
4049 Views

A ball is dropped from rest from a window 3m above ground height. How long will it take the ball to hit the ground? (You may assume air resistance on the ball is negligible.)

This is a very common mechanics question you can be asked in a physics exam (or a M1 maths exam!). The key to solving it is to realise that the ball is in freefall, so it is only acted on by gravity. Since t...
MP
Answered by Metha P. • Physics tutor
5402 Views