the body will move only when force of friction?
318427
The body moves only when an external force is applied to it. It stops when the frictional force acts on the object in the opposite direction.
924891
Explanation: If an object is moving with a constant velocity, then by definition it has zero acceleration. So there is no net force acting on the object. The total work done on the object is thus 0 (that's not to say that there isn't work done by individual forces on the object, but the sum is 0 ).
15410
Static friction is what keeps the box from moving without being pushed, and it must be overcome with a sufficient opposing force before the box will move. Kinetic friction (also referred to as dynamic friction) is the force that resists the relative movement of the surfaces once they're in motion.
1090949
The direction of static friction is opposite to the velocity with respect to the body applying friction. The body applying friction is the ground. With respect to the ground, the block moves right. So the direction of frictional force on the block must be towards the left as per the statement.
677691
['Friction is responsible for many types of motion.', 'It helps us walk on the ground.', 'Brakes in a car make use of friction to stop the car.', 'Asteroids are burnt in the atmosphere before reaching Earth due to friction.', 'It helps in the generation of heat when we rub our hands.']
425957
Friction force always acts opposite direction of motion of the body. Good effects--- (i) Friction between our shoes and the floor stop us from slipping. (ii) Friction between tyres and the road stop cars from skidding. ... (iii) Friction with air causes air craft, rockets to heat up.
558147
Newton's First Law of Motion states that a body at rest will remain at rest unless an outside force acts on it, and a body in motion at a constant velocity will remain in motion in a straight line unless acted upon by an outside force.
1357571
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... If that velocity is zero, then the object remains at rest. If an external force is applied, the velocity will change because of the force.
54397
False - Forces, if unbalanced, can cause objects to accelerate (one form of moving; the other form is moving at a constant velocity). But by no means can one say that forces always cause objects to move.
1248015
Friction can't affect mass of a substance(considering for a substance whose mass doesn't change with time),rather it is the mass of an object which can affect friction variously. Let's take some example to understand the situation. So,higher the mass of the object,higher will be the frictional force.
324409
There the frictional force is proportional to the velocity for small velocities. That proportionality breaks down when the velocity becomes larger.
38257
Momentum is amount of motion in a moving body, whereas force is an action of push or pull. Force changes momentum of a body. Force does not change for constant acceleration whereas momentum changes. Momentum increases with time for an applied force.
94482
Friction is a general term. If you are referring to frictional force, then it's unit is Newtons (N). It's an opposing force and always acts opposite to the direction of motion. If you are talking about frictional coefficient (u), then it is dimensionless.
968629
Friction, by its nature, always acts opposing the relative motion between two surfaces. work done by friction can be zero, when there is no relative motion. But positive work cannot be done under any circumstances, if you see it from a reference frame fixed to one of the two surfaces.
408202
Friction acts in a direction opposite to the object's direction of movement.
579268
The force due to friction is generally independent of the contact area between the two surfaces. This means that even if you have two heavy objects of the same mass, where one is half as long and twice as high as the other one, they still experience the same frictional force when you drag them over the ground.
916267
The answer is the surface in contact or friction force. So the only way to accelerate a body is to change its velocity which is also a vector. Change its direction and thats the answer keeping the speed constant. Speed is the magnitude of the velocity vector.