The puck does not change direction, nor does it slow down or speed up but instead moves at a constant speed. Newton’s laws state that when the puck is at rest or coasts at a constant rate in a straight line,
there is no net force acting on the puck
.
Can you move if no net force is acting on it?
An object with no net forces acting on it which is
initially at rest will remain at rest
. If it is moving, it will continue to move in a straight line with constant velocity. Forces are “pushes” or “pulls” on the object, and forces, like velocity and acceleration are vector quantities.
What is the horizontal force acting on the puck?
Since ice is frictionless, then frictional force is zero and there is no other external force is acting on the puck in the horizontal direction. Hence, the net force acting on the puck
is zero
and it glides with constant velocity.
Which horizontal forces act on the last ball?
There are two forces acting on the ball:
tension from the string and force due to gravitation
. They cancel each other.
What forces are acting on the puck?
- weight.
- friction.
- force of velocity.
- force of push.
- normal force.
- air drag.
- acceleration.
Are the forces acting on the puck balanced?
If the puck remains on the surface, there is also balance in the vertical sense.
The downward pull of gravity is balanced by the upward force the surface exerts on the puck from below
. The mass m would then behave as if there were no force at all.
Why does the puck slow down after being hit?
Although it is slick, an ice surface provides some friction that slows the puck. … An object sliding across a table or floor slows down
due to the net force of friction acting on the object
.
What is the acceleration of the puck?
If a constant force F is applied for a short time T, and if the puck has mass m and is initially at rest, then the puck will accelerate to a speed v given by v = aT where
a = F/m
is the acceleration of the puck. … Given that the acceleration to to gravity is 9.8 m/s
2
, the acceleration of a puck is huge by comparison.
What is the coefficient of friction between the puck and the ice?
Assuming the coefficient of friction is
about 0.1
for our puck on ice, using some basic kinematics and Newton’s handy laws, that gives a stopping distance of just over 1000 m when the puck is hit with a starting speed of 160 km/hr.
What is the average acceleration of the puck as it slides across the ice?
The puck’s acceleration is –
4.6 m/s2
[fwd].
Can a body move without force?
Yes,
it is possible to have motion without a force being present
. Newton’s first law states that, in fact, an object must continue to move at the same…
Can a moving object have a net force of 0?
Newton’s First Law of Motion
An object’s velocity (a vector) does not change if and
only if the net force acting on the object is zero
. In other words, if there is no net force on an object, its speed and direction of motion do not change (including if it is at rest).
What is always true of non contact forces?
What is true of non-contact forces?
They become weaker with distance
. … Unbalanced forces lead to a change in speed or direction.
What is the force you have to overcome to start an object moving?
| Question Answer | Which force do you have to overcome to start an object moving? static friction | Whenever something is in motion, there is always _______ to oppose the motion. reaction | Which law of motion states the relationship among force, mass, and acceleration? Newton’s Second Law |
|---|
What happens when two forces act in the same direction?
When two forces act on an object in the same direction,
they add up in order to give a resultant large force
. The magnitude of the forces also add up to produce a resultant that is equal to the sum of the two forces acting in the same direction.
What forces act on a hanging object?
The thing you must understand is
tension act
in the opposite direction of the gravitational force. If your object is hanging it must balanced by tension, otherwise it will accelerate down due to gravity.
