If an object is moving at a constant speed the force of friction must equal the applied (horizontal) force , and for it to be accelerating or decelerating, the force of friction and the applied force must be unequal.
Does constant speed mean no force?
If a body is moving with constant velocity, acceleration is zero . So net force acting on it will be also zero. But the body has energy due to its constant motion.
Does constant speed mean no friction?
Once moving, if there is no friction , then the object will continue to move at a constant speed unaided. ... The driving force balances the effect of friction. When this happens, there is no resultant force acting on the object, but this doesn’t mean that there are no forces at all.
What does constant speed mean for net force?
Introduction. According to Newton’s first law, a body in motion will remain in motion with constant velocity if the net force acting on it is zero. Constant velocity means that both the speed and direction do not change .
What does it mean to have a constant speed?
An object is travelling at a steady or constant speed when its instantaneous speed has the same value throughout its journey . For example, if a car is travelling at a constant speed the reading on the car’s speedometer does not change.
Can a body have acceleration with zero velocity?
Answer: Yes , an object can have zero velocity and still be accelerating simultaneously. ... While observing the object, you will find that the object will continue to move forward for some time and then stops instantly. Then the object will start to move in the backward direction.
What is the net force if you start to pull instead of pushing in 6?
What is the net force if you start to pull instead of pushing in #6? An object will continue in its state of motion unless an unbalanced force is acting on it. If forces are balanced, then the net force equals 0 .
What is the direction of the net force?
The direction of the net force (or unbalanced force) acting upon an object is the same as the direction of the acceleration . Objects which move in a circle at a constant speed are accelerating. The acceleration is directed towards the center of the circle.
Can constant speed have zero net force?
If a body is moving with constant velocity, acceleration is zero. So net force acting on it will be also zero . But the body has energy due to its constant motion. Take the case of a freely falling body: it reaches its terminal velocity (120mph) when gravity = air resistance (drag).
Is it possible for an object to be in motion if no net force is acting on it?
Acceleration is the change of velocity per unit time, so if there is no force, all we know is that the acceleration is zero. Therefore, the velocity is not changing. If the object was already moving, then it will just keep moving. So, yes , the object can be moving when there is no force applied to it.
What’s an example of constant speed?
Constant speed means the speed does not change at all for each second of the motion. Our example of driving a car on cruise control illustrates constant speed.
Is constant speed a balanced force?
If the forces are unbalanced, the object will either speed up or slow down. The reverse logic is also true: if an object has a constant velocity, then the forces are balanced . And if an object is speeding up or slowing down, the forces are unbalanced.
What is another word for constant speed?
| cruise coast | stream ride | keep a steady pace keep steady pace | skate fly | smooth along pass |
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Does 0 velocity mean 0 acceleration?
For the most part velocity is not zero if an object is accelerating . ... If the velocity is constant however, the acceleration is zero (because the velocity isn’t changing over time). Although at an instant in time it is possible to have zero velocity whilst accelerating.
Can a body have zero speed but non zero velocity?
Answer: (a) True. When a body begins to fall freely under gravity, its speed is zero but it has non-zero acceleration of . ... Speed is the magnitude of velocity and the magnitude of non-zero velocity cannot be zero.
Can you have a zero acceleration and nonzero velocity?
It is possible to have a non-zero value of acceleration when the velocity of a body is zero . ... At the highest point, the velocity of the ball becomes zero, after which it starts to fall down. At this point, the velocity of the ball is zero yet its acceleration is equal to g=9.8m/s2.
