Answer:
<u>Force</u><u> </u><u>is</u><u> </u><u>2</u><u> </u><u>×</u><u> </u><u>1</u><u>0</u><u>^</u><u>-</u><u>4</u><u> </u><u>N</u>
Explanation:
F is force
I is current
r is separation distance
gamma is a constant
l is wire length
Answer:
A) -567.675 J
B) 0.284
Explanation:
Parameters given:
Mass of player, m = 60 kg
Distance slid, d = 3.40 m
Speed = 4.35 m/s
A) We know that work done is equal to change in kinetic energy of a body:
W = ΔKE
Change in kinetic energy is given as:
where m = mass
v = velocity
=>W = ΔKE = -0.5 * 60 * 4.35 * 4.35 = -567.675 J
The work is negative because the force of friction acts opposite the motion of the player.
B) We have that:
Fr = μmg
where Fr = Frictional force
μ = coefficient of kinetic friction
g = acceleration due to gravity
Work done is give as:
W = Fr * d
(d = distance moved)
=> Fr = W/d
Therefore:
W / d = μmg
=>μ = W / (m * g * d)
μ = (567.675) / (60 * 9.8 * 3.40)
μ = 0.284
It traveled a distance of 36 meters because to find distance you have to multiply time and speed