True: when there is an angle between force and displacement, 
Explanation:
The work done by a force when pushing/pulling an object is given by the equation
where
F is the magnitude of the force
d is the displacement of the object
is the angle between the direction of the force and of the displacement
We have two extreme cases:
- When the force is parallel to the displacement, then 
and 
, so the work done is maximum and simply becomes
- When the force is perpendicular to the displacement, then 
and 
, so the work done is zero.
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➢ 1. force = mass × <u>acceleration</u>
➢ 2. Since unit of weight = kg•m/s²
Explanation:
We'll call the radius r and the diameter d:
We also assume that the riders are at a distance r = d/2 = 7m from the center of the wheel.
The period of the wheel is 24s. The tangent velocity of the wheel (and the riders) will be: (2pi/T)*r = 0.8 m/s (circa).
It means that in 3 minutes (180 seconds) they'll run 0.8 m/s * 180s = 144m.
Hopefully I understood the question. If yes, that's the answer.
The answer to this question is c
"lets exercise and eat healthy foods together"<span />
You performed 0 work for the fact that work means the distance of movement made on an object not the amount of force it is exposed to. 0 work because it didn't move
