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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.
If an object is moving at a constant speed in one direction what is needed to change its speed or direction?
To change the speed or direction of an object moving at a constant speed, a force must be applied in the opposite direction of its motion to slow it down and a force must be applied in the desired direction of its new path to change its direction. The magnitude and direction of the force will determine how much the speed or direction changes.
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.
What does a force in the opposite direction to the motion cause?
A force in the opposite direction to the motion of an object causes deceleration or slowing down of the object. This force acts against the initial motion, reducing the speed or changing the direction of the object.
Which type of forces cause changes in speed and direction?
Any force that is not canceled by an equal opposite force.
What changes the direction of a force?
The direction of a force changes when another force acts in the opposite direction to oppose it, or when the object experiencing the force changes its own direction of motion.
An object can speed upslow down or turn in the direction of the net force when?
An object can speed up when the net force acting on it is in the same direction as its motion. It can slow down when the net force is opposite to its motion. The object can turn in the direction of the net force when the force is applied perpendicular to its motion, causing it to change direction.
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.
Which a force changes the speed of an object?
A force can change the speed of an object by either accelerating or decelerating it. The direction and magnitude of the force will determine how the object's speed changes - an applied force in the direction of motion will accelerate the object, while a force in the opposite direction will decelerate it.
How do unbalanced forces change the speed?
Unbalanced forces can change the speed of an object by causing it to accelerate in the direction of the greater force. If the unbalanced force is in the direction of motion, the object will speed up. If it is in the opposite direction, the object will slow down or even come to a stop.
What happens when a force is applied to an object while the object moves in a direction opposite to the force?
When a force is applied to an object in the opposite direction of its motion, the object will slow down. The force will act as a decelerating force, causing the object to lose speed and eventually come to a stop if the force continues to be applied.
When An unbalanced force can cause an object to change its speed and or?
direction of motion. It is a force that is not counteracted by an equal and opposite force, resulting in acceleration or deceleration of the object.
