Uniform Circular Motion

An object is moving in a circle at constant speed. From this, you know that there

• is no net force acting on the object

• are two balanced forces acting

• is an unbalanced force acting on the object

• must be more than two forces acting on the object

Tags

NGSS.HS-PS2-1

Both centripetal force and centripetal acceleration are directed

• away from a central point

• toward a central point

• tangent to the radius

• opposite from each other

The centripetal force needed to hold a body in uniform circular motion is provided by

• a tension force

• the force of friction

• the normal force

• the gravitational force

• Any of these forces can provide a centripetal force

A 3.0 N centripetal force acts on a toy car, if the car's mass is doubled then the force is...

 $\Sigma F_{net}\ =\ \frac{mv^2}{r}$  

• 3.0 N

• 6.0 N

• 9.0 N

• 1.5 N

Tags

NGSS.HS-PS2-1

An object moves in a circle. The net force is 5.0 N. If the student doubles the speed, what force is needed?

 $\Sigma F_{net}\ =\ \frac{mv^2}{r}$  

• 2.5 N

• 5.0 N

• 10.0 N

• 20.0 N

Tags

NGSS.HS-PS2-1

A car moving around a curve at a constant speed of 150 mph is accelerating.

• True, because it is moving at a constant speed.

• True, because it is changing direction.

• False, because it is not a constant velocity.

• False, because it is moving at a constant speed.

Tags

NGSS.HS-PS2-1

The mints rotating on top of the turntable all have the same period.

• True

• False

Tags

NGSS.MS-PS3-1

The mints rotating on top of the turntable all have the same tangential velocity.

• True

• False

The mints rotating on top of the turntable at constant speed all have the same

• Centripetal Acceleration

• Angular Acceleration

• Tangential Acceleration

If she lets go of the bucket, it will move in a straight line tangent to the circle.

• True

• False

Tags

NGSS.HS-PS2-1