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A roller-coaster train at rest has a mass of 30 tons If a force of 50000 N acts on it for 12 s then what is its momentum after that time and what is its velocity?
Wiki User
∙ 13y ago
according to Newton's second law the force experienced by an object is directly proportional to its rate of change of momentum.
F = m(v-u) /t
where:-
F = the average force applied
m = the mass of the object
u = the initial speed
v = final speed
t = time
thus when rearranged when u = 0
50000 x 12 = 30000(v-0)
60=3v
v=20ms-1
speed = 20 thus momentum is 100000 Kgms-1
Wiki User
∙ 13y ago
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What happens to the momentum of a body acted on by an external force?
If the force opposes the motion, it will reduce the velocity and the momentum of the body will decrease. If the force is in the direction of the motion, the velocity will increase and the momentum will increase.
What happens to momentum if you quadruple the force?
Momentum is mass x velocity. It is not directly related to force.
What affect momentum?
force and acceleration
Why an object will move if its velocity is constant?
Momentum. If an object has constant velocity, the object will move because it has momentum. Momentum tends to stay the same unless changed by a force.
What is an object's momentum?
It's the mass of a object on its velocity (the velocity is a vector and as result of multiplication of a scalar (mass) on a vector (velocity) you get a vector (momentum). Intuitively, momentum is the property of a body which enables it to resist a force.
Momentum is the product of mass and what of an object?
mass multiplied by velocity gives momentum.
What is the difference between a small momentum and a large momentum?
The larger the momentum, the harder it will be to stop it. Thus, the larger the force needed to decelarate the object. Since momentum is directly proportional to the velocity, the larger the momentum, the larger the velocity.
What is the main difference between momentum and moment?
moment is nothing but a force but momentum is the product of mass and velocity.
How can momentum be increased?
Either by increasing the mass of the body or its velocity.
Can impulse of force zero even force is not 0?
Yes. A non-zero force may not be sufficient to alter the velocity - for example if it is smaller that the limiting friction. No change in velocity implies no change in momentum and so impulse = 0.
What kind of force moves an object away?
By definition, any force enacts a change in momentum. Momentum is mass times velocity, so a force is a change in mass and/or velocity. Since mass is usually constant, any force therefore enacts a change in velocity, and thus moves an object away.
What kind force moves an object away?
By definition, any force enacts a change in momentum. Momentum is mass times velocity, so a force is a change in mass and/or velocity. Since mass is usually constant, any force therefore enacts a change in velocity, and thus moves an object away.
