Answer: D. 40
Explanation:
Power = Force * Velocity
Force = 600N
Power needs to be converted to Watts:
= 24 * 1,000
= 24,000 W
24,000 = 600 * Velocity
Velocity = 24,000/600
= 40 m/s
Answer:
e is the answer
Force F=5.119*10^-4N
Explanation:
Given that
Current in wire a Ia=12A
Current in wire b (lb)=14A
Length of wire is L=6.4m
Distance apart (r)=42cm=0.42m
Also note that U°=4π*10^-7
We are to calculate for the force
F=(U°IaIbL/2πr)
F=4π*10^-7*12*14*6.4/2π*0.42)
F=5.119*10^-4N
Answer:
D) Both do zero work
Explanation:
The work done by a force is given by:
where
F is the force applied
d is the displacement
is the angle between the direction of the force and the displacement
From the formula, we notice that work is done online when the displacement is non-zero, so when the object is moving.
In this problem, the wall is stationary: this means that the displacement is zero, d = 0, so no work is done.