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Speed and force are quite different things.
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∙ 12y ago
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How does drag work?
Drag force, or the force of air friction for a falling body, increases with speed. A falling object will reach a speed at which the force of air friction will be equal to and opposite the force of gravity. At that point, the object will no longer accelerate. It's speed will remain constant, and we call that speed (and direction) its terminal velocity.
Can a speed of a body be negative?
The 'speed' of a body cannot be negative. But if you are stating the 'velocity' then it can be negative. Negative velocity means it is going opposite to the direction that you decided to call the positive direction.
What does the slope of a linen on a distance - time graph represent?
The speed. Also, if a positive slope represents the speed in one direction, the negative slope is the speed in the opposite direction.
Is speed equal to velocity?
Velocity is a vector, which means it has a direction, but speed isn't. Speed is the absolute value of velocity. Velocity can be negative, meaning that the speed is opposite to the direction that you're calling the positive direction.
What is the force acting on 2800 kg truck if its slows down from 60 meter per secs. to 35 meter per secs. in 6 seconds?
(-)11,666.67 N. To calculate this, you need to use the impulse-momentum principle, whereby the change in momentum is equal to the force multiplied by the time over which the force is applied. The change in momentum here is the final speed x the mass - the initial speed x the mass. Then divide the answer by the time (six seconds) and the answer will be the force applied (in this case the answer is negative as the force is applied in the direction opposite to the direction of the truck's motion.)
Does speed increase when the net force is opposite to the direction of motion?
When the net force on a body is in the opposite direction to the motion of the body the speed of the body will never increase rather retardation will take place and the body will lose its speed.
How speed increase by applying force?
Applying more force in the direction of travel will increase the acceleration and therefore speed. If more force is applyed opposite to the direction of travel, acceleration will decrease.
Which type of forces cause changes in speed and direction?
Any force that is not canceled by an equal opposite force.
How does extra force affect an objects speed?
F=ma, according to Newton's laws, so some more force will accelerate the object (that is, change its velocity in the direction of the force) at a rate of F/m. Speed is just how fast the object is going, while velocity is a combination of speed and direction. If the force is applied in a direction opposite the velocity, the speed will decrease. If the force is applied in the same direction, it will increase.
What changes the direction of a force?
Force changes either the speed or the direction of motion, or both.
Type of force can cause an object to change direction?
Any force will cause change in velocity (speed and/or direction)if it isn't canceled by an equal, opposite force.
How does force make an object stop moving?
By accelerating it in the direction opposite to its motion, and then quickly removing the force when it's speed is zero.
What force is needed to stop an object at constant speed?
Any force will do, but the larger the force, the faster will the object stop. The force, of course, has to be applied in the direction opposite to the movement.
An unbalanced force can cause an object to change its speed and or?
The object will speed up, slow down or change direction. An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. ... If however, the forces are balanced (in equilibrium) and there is no net force, the object will not accelerate and the velocity will remain constant.
Does friction cause the speed of moving objects to increase?
No, the force of friction always acts in the direction opposite to that of the motions.
How do you find force when given a constant speed and force of friction?
If the speed is constant, then the group of forces acting on the object is balanced. So the portion of the force acting in the direction of the motion must be equal and opposite to the force of friction.
Explain how frictional force is used to reduce the speed of a moving object?
Friction is a force that always acts in a direction opposite to that of motion. So the frictional force does negative work on the velocity of an object ( thus reducing the speed of an object).
