Torque = r x F
|F| = mg = 60 * 10 N = 600 N ( assuming g ~ 10m/s^2)
distance of fulcrum = torque / Force = 90/600 m = .15 m.
Momentum is a vector quantity. The direction of the momentum vector is the same as the direction of the velocity of the ball. In a previous unit, it was said that the direction of the velocity vector is the same as the direction that an object is moving.
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B and D
Because these two points are below equator on sun is shining directly above equator which is experiencing summer
#4. It says "someone sitting in a chair" So the objects involved are the person and the chair. D is the answer because it talks about the action/reaction forces between the person and the chair.
#5. Work = Force (parallel to direction of distance) * distance. A, B and D are not correct because there is no distance. C. is the best answer