# GCSE Physics

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#1
Help pls
Two skaters have the same mass and velocity but their momentum is different why?
0
2 years ago
#2
(Original post by richmanswagoh)
Help pls
Two skaters have the same mass and velocity but their momentum is different why?
At GCSE level momentum = mass x velocity

*Remember, velocity is speed with direction*

Therefore, the momentum of an object also depends on the direction of travel.

The momentum of an object can change if the object accelerates/decelerates and if the object changes direction.

So... the skaters may be accelerating/ decelerating at different rates or they may be changing their direction
2
2 years ago
#3
moved to physics
0
#4
(Original post by Ash:))
At GCSE level momentum = mass x velocity

*Remember, velocity is speed with direction*

Therefore, the momentum of an object also depends on the direction of travel.

The momentum of an object can change if the object accelerates/decelerates and if the object changes direction.

So... the skaters may be accelerating/ decelerating at different rates or they may be changing their direction
But their velocity is same so how are the accelerating/decelerating or changing direction.
0
2 years ago
#5
(Original post by richmanswagoh)
But their velocity is same so how are the accelerating/decelerating or changing direction.
A change in direction doesn’t mean that their speed changes; may be travelling in opposite directions at the same speed.

Acceleration is the rate of change of velocity over time.

I don’t know how much you’ve learnt on the topic, but if I were to explain it in detail, we’d be going into a level physics. Perhaps it may be useful to purchase a CGP revision guide which will probably explain the topic better than I can! Also try and speak to your physics teacher about this to clear any issues

Hope this helps
Last edited by Ash:); 2 years ago
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#6
(Original post by Ash)A change in direction doesn’t mean that their speed changes; may be travelling in opposite directions at the same speed.

Acceleration is the rate of change of velocity over time.

I don’t know how much you’ve learnt on the topic, but if I were to explain it in detail, we’d be going into a level physics. Perhaps it may be useful to purchase a CGP revision guide which will probably explain the topic better than I can! Also try and speak to your physics teacher about this to clear any issues

Hope this helps

Thanks alot
0
2 years ago
#7
Because velocity is a vector, one of the skater's velocity will be negative. Because momentum is velocity × mass, this will give one positive momentum and one negative
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