Answer:
Change in KE is 40 J
Explanation:
Recall that the impulse exerted on an object equal the change of momentum of the object (ΔP), which in time is defined as the product of the force exerted on it times the time the force was acting:
Change in momentum is: ΔP = F * Δt
In our case,
ΔP = 40 N * 1 sec = 40 N s
Since the object was initially at rest, its initial momentum was zero, and the final momentum should then be 40 N s.
So, the initial KE was 0, and the final (KEf) can be calculated using:
KEf = 1 /(2 m) Pf^2 = 1 / (40) 40^2 = 40 J
So, the change in kinetic energy is:
KEf - KEi = 40 J - 0 j = 40 J
Answer:
Mandaloun won the race.
Explanation:
First, we will calculate the time taken by the Hot Rod Charlie:
where,
t = time taken by Hot Rod Charlie = ?
s = distance covered = 1.25 miles
v = speed of Hot Rod Charlie = 0.79 miles/min
Therefore,
Since Hot Rod Charlie took more time (1.58 min) than the Mandaloun (1.52 min).
<u>Therefore Mandaloun won the race.</u>
the mass would remain the same and the weight would change. mass defines the actual amount of an object, while weight is the force gravity has on that object. gravity is different on the moon and the earth therefore the weight will change
