This is an example of negative acceleration. It's also an example of simultaneous cardiovascular and muscle fatigue.
Answer:
The mass of the puck is 0.166 kg
Explanation:
It is given that,
Speed of the ice hockey puck, u = 12 m/s
Impulse delivered by the hockey stick, J = 4 kg-/s
After delivering an impulse, the puck move off in the opposite direction with the same speed, v = -12 m/s
We need to find the mass of the puck. The impulse is equal to the change in momentum i.e.
m is the mass of the puck
So, the mass of the puck is 0.166 kg. Hence, this is the required solution.
<h2>Impulse = Change in momentum = </h2><h2>Force x time = 32 kgms⁻¹</h2>
Explanation:
IMPULSE :
A large force acting for a short time to produce a finite change in momentum is called an impulsive force. It is defined as the product of the force and the time for which it acts and is equal to the total change in momentum.
we have F = 80 N
t = 0.4 s
Impulse = change in momentum = Force X time duration
= 80N x 0.4s = 32 kgms⁻¹
Answer:
525,000J
Explanation:
Power = work/time
Given
Power = 350 watts
Time = 25 mins = 25 x 60 = 1500 secs
Therefore
350 = work/1500
Cross multiply
Work = 350 x 1500
Work = 525,000J