Upon which of the following objects is the net force acting zero?

A ball moving

0 m / s

at the top its trajectory after being thrown straight up into the air

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A ball moving around in a circular path at a constant speed

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A block being pushed straight across a rough surface at a constant speed

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A planet moving around the sun

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Solution

The correct option is C A block being pushed straight across a rough surface at a constant speed
Gravitational force constantly acts on an object in its trajectory, and on a planet moving around the sun.
Centripetal force acts on ball moving in circular path.
When a block is moving at constant speed on rough surface, the force of friction is balanced must be balanced by an external force to produce a net zero force.

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Similar questions

Q. In which of the following examples, there is zero net force acting on the object ?
I. A car drives around a circular path at a constant speed.
II. A person pushes on a door to hold it shut.
III. A ball, rolling across a field, slowly comes to a stop.

In which of the following statements is a net force of zero acting on the object in question?
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B. A person pushes on a door to hold it shut
C. A ball, rolling across a grassy field, slowly comes to a stop

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