Question

Objects moving along a circular path have a centripetal accel- eration provided by a net force directed towards the center. Identify the force(s) providing the centripetal acceleration in each of these cases: (a) a planet in circular orbit around its sun; (b) a car going around an unbanked, circular turn; (c) a rock tied to a string and swung in a vertical circle, as it passes through its highest point; and (d) a dry sock in a clothes dryer as it spins in a horizontal circle.

Answer 1

Answer:

a) In this system the only force is the gravitational force, acting as a centripetal force.

b) In this system, the acting force is the friction force, inward.

c) In this system, only tension and gravity act as forces

d) In this system, only the normal force inside the dryer acts.

Explanation:

Answer 2

(a) The force proving the centripetal acceleration in this scenario is gravitational force.

(b) The force proving the centripetal acceleration in this scenario is frictional force.

(c) The forces proving the centripetal acceleration in this scenario are tension force and gravity.

(d) The force proving the centripetal acceleration in this scenario is Normal force.

What is centripetal acceleration ?

This is the acceleration of an object moving in circular path.  

Planet in circular orbit around its sun

The force proving the centripetal acceleration in this scenario is gravitational force.

Fc = mg

mv²/r = mg

A car going around an unbanked, circular turn

The force proving the centripetal acceleration in this scenario is frictional force.

Fc = Fs

A rock tied to a string and swung in a vertical circle, as it passes through its highest point

The forces proving the centripetal acceleration in this scenario are tension force and gravity

T - mg = mv²/r

A dry sock in a clothes dryer as it spins in a horizontal circle.

The force proving the centripetal acceleration in this scenario is Normal force.

Fn = mv²/r

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