Answer: Total length is 15.7 centimeters.
Explanation:
The potential energy is modelled by applying Principle of Energy Conservation and Work-Energy Theorem:
The spring constant can be found by using Statics:
Where .
The total length is isolated from energy expression:
The acceleration of the object which moves from an initial step to a full halt given the distance traveled can be calculated through the equation,
d = v² / 2a
where d is distance, v is the velocity, and a is acceleration
Substituting the known values,
180 = (22.2 m/s)² / 2(a)
The value of a is equal to 1.369 m/s²
The force needed for the object to be stopped is equal to the product of the mass and the acceleration.
F = (1300 kg)(1.369 m/s²)
F = 1779.7 N
Answer:
7. (D) uniformly accelerated vertical motion
8. (A) zero
9. (A) zero
10. (C) parabolic
Answer:
The coefficient of kinetic friction between the puck and the ice is 0.05.
Explanation:
Given that,
Weight of the hockey puck, W = mg = 3.5 N
Acceleration of the hockey puck,
The frictional force opposing the motion of the puck is given by
This force is balanced by the force due to motion of the hockey puck. So,
or
So, the coefficient of kinetic friction between the puck and the ice is 0.05. Hence, this is the required solution.
Answer:
20.14 KG
Explanation:
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