Asked by: Matei Wennersscience physics
What force is needed to maintain the speed of an object if there is no resistance?
Last Updated: 1st March, 2020
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Also to know is, what force is needed to stop an object?
The larger the velocity of a moving object thegreater the force required to stop it in a given timeinterval. Fig. 1. The force to stop a vehicle dependson its momentum. An external non-zero net force acting on anobject is equal to the rate of change of momentum of theobject.
One may also ask, what forces are acting on an object at rest? An object at rest stays at rest and anobject in motion stays in motion with the same speed and inthe same direction unless acted upon by an unbalancedforce.
Just so, what can you say about the speed of a moving object if no force is acting on to it?
The speed, or actually the velocity, of amoving object, if no force is acting on it,will be in a straight line with a constant speed(no acceleration), as required by the First of Newton'slaws. The speed of a object if no force is noforce acting on it then object is not stop anddo not change speed in obtect.
Which force acts upon a motion to stop it or slow it down?
Friction is an external force that actsopposite to the direction of motion (see Figure 4.3). Thinkof friction as a resistance to motion that slows thingsdown. Consider an air hockey table. When the air is turnedoff, the puck slides only a short distance before friction slows itto a stop.