The force is applied to the accelerating object that has a constant mass. Option A is correct.
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What does Newton's second law of motion state?</h3>
The force applied to the object is the product of its mass and acceleration.
Where,
- force
- mass
- acceleration
From the equation, the force and the acceleration are in a proportional relation. The mass is not changing as given in the question.
Therefore, the force is applied to the accelerating object that has a constant mass.
Learn more about Acceleration:
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Force = (mass) x (acceleration)
Force = (18 kg) x (3 m/s²) = 54 newtons
As long as you continue pushing the cart with 54 newtons of force,
it will accelerate at 3 m/s².
At the instant you release it, or keep your hands on it but stop pushing,
it will stop accelerating. It'll continue forward at the speed it had when
the 54 newtons of force stopped.
Answer:
1.6727 meters
Explanation:
The inicial kinetic energy of the mass can be calculated using the formula:
E = mv^2/2
where m is the mass and v is the speed, so:
E = m*1.9^2/2 = 1.805m
All this energy is lost to the friction between the mass and the ground.
The friction force is F = m*g*u, where g is gravity and u is the coefficient of kinetic friction.
The energy that this force will generate is:
E = F * d, where d is the distance.
So, making the inicial kinetic energy equal to the energy dissipated by the friction, we have:
1.805m = m*g*u*d
9.81*0.11*d = 1.805
d = 1.805/(9.81*0.11) = 1.6727 meters