Resistance from air and friction.
An object which is moving doesn't need a force to keep it moving.
the heavier and the bigger the object the more force you need to use to keep it moving . the less weight and the smaller an object is the less force you need to use to keep it moving. it always depends on the weight of the object and the size of the object.
The lever.
No force is needed to keep an object moving. An object with no forces on it keeps moving at a constant speed in a straight line. If there is any force acting on it to make it slow down, then you need just enough force to cancel the first one, in order to keep it moving.
No force is needed to keep an object moving. An object with no forces on it keeps moving at a constant speed in a straight line. If there is any force acting on it to make it slow down, then you need just enough force to cancel the first one, in order to keep it moving.
It takes more force to get an object moving because you need to overcome its initial inertia, which is the resistance of the object to changes in its motion. Once the object is moving, it requires less force to keep it in motion because there is less resistance once it has overcome the inertia.
If there's nothing else holding it back, then any force will move any mass. Andonce you get it moving, you don't need any force at all to keep it moving.
This depends upon where the stone is.In a vacuum with no gravitational fields nearby you would need no additional energy to keep a stone flying, the first throw would do it and it would continue until another force acted upon it.To keep a stone moving on the Moon you will need to keep putting in sufficient energy to overcome the gravity there.To keep a stone moving on Earth you would have to keep putting sufficient energy in to overcome a higher gravitational field and the drag caused by the atmosphere.
Not if you ignore air resisteance, friction etc. A spacecraft does not need to fire its engines once in space to keep traveling at the same velocity. However, if your body in question is subject to air resistance or friction, then you need to apply force to keep it moving at constant velocity. For instance on a bike on a flat road, you can freewheel but you slow down due to air resistance and friction (in the wheel bearings and tyres on the ground). You have to pedal (i.e. apply a force ) now and again
They need the force to overcome the friction between the lorry and the road.
It requires more force to start an object than to keep it sliding because you need a strong push to slide the box and once the box starts sliding, the friction of the floor acts between the floor and the bottom surface of the box
You should push with a force equal to the force of friction acting on the crate. This will counteract the friction force and allow the crate to continue moving at a constant velocity. Pushing with a greater force will accelerate the crate, while pushing with a force lower than the frictional force will cause it to decelerate.