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toljin
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Basic Physics
First post so be gentle :). I have a couple of questions :)
1) The acceleration of a body is given by a(t) = 4t3 + 3ms-2. Find its velocity and displacememt if v(1) = 0ms-1 and x(1) = 2m
2) Calculate the momentum of a mass of 10kg when its velocity is 8ms-1
3) An object of mass 5kg moves from rest with an acceleration of 0.15ms-2 calculate its velocity,displacement and kinetic energy 10 seconds later.
4) In an experiment to determine the acceleration due to gravity you drop a dall bearing, from rest, through a vertical distance of 45m and find it takes 3 seconds to reach the ground.Calculate the acceleration due to gravity and your weight.
1) Displacement = x(1) = 2m - initial position which is = 0 so displacement = 2m
Velocity = displacement/time <-- can't figure this out :/
2) 10 * 8 = 80 m/s
3) again I can't seem to figure this out
4) g = 2(45m)/3s^2 = 10ms^-1
First post so be gentle :). I have a couple of questions :)
1) The acceleration of a body is given by a(t) = 4t3 + 3ms-2. Find its velocity and displacememt if v(1) = 0ms-1 and x(1) = 2m
2) Calculate the momentum of a mass of 10kg when its velocity is 8ms-1
3) An object of mass 5kg moves from rest with an acceleration of 0.15ms-2 calculate its velocity,displacement and kinetic energy 10 seconds later.
4) In an experiment to determine the acceleration due to gravity you drop a dall bearing, from rest, through a vertical distance of 45m and find it takes 3 seconds to reach the ground.Calculate the acceleration due to gravity and your weight.
The Attempt at a Solution
1) Displacement = x(1) = 2m - initial position which is = 0 so displacement = 2m
Velocity = displacement/time <-- can't figure this out :/
2) 10 * 8 = 80 m/s
3) again I can't seem to figure this out
4) g = 2(45m)/3s^2 = 10ms^-1