COMPLETION TEST (MODULES 3 and 4) - UCM

Which of the following motion is a uniform circular motion?

• A planet revolving around its own axis.

• A planet travelling around an elliptical orbit.

• A car moving in a roundabout with varying speed.

• An electron in orbit around a nucleus following Bohr’s model.

Which is TRUE about the relationship of the centripetal acceleration and radius?

• The centripetal acceleration is directly proportional with the radius.

• The centripetal acceleration is inversely proportional with the radius.

• The centripetal acceleration is directly proportional to the square of the radius.

• The centripetal acceleration is inversely proportional to the square of the radius.

What will happen to the period of particle moving in uniform circular motion if the radius increased twice its original value?

• The period will be twice its original value.

• The period will decrease ¼ its original value.

• The period will be four times its original value.

• The period will decreased by half of its original value.

Which acceleration is parallel to the direction of V₁?

• Radial Acceleration

• Centripetal Acceleration

• Tangential Acceleration

• Gravitational Acceleration

A car is moving around a roundabout several times. If the period of the car’s motion is decreasing, it means that ________________.

• the car is speeding up

• the car is slowing down

• the car is speeding up then slows down

• the car is slowing down the speeds up

What will happen to the centripetal acceleration if the radius of the circular path is multiplied four times its original value?

• It will be divided by four.

• It will be multiplied by four.

• It will decrease by half.

• It will be multiplied by two.

Which variable affects the angular speed of a particle moving in a uniform circular motion?

• Period

• Radius

• Radial Acceleration

• Tangential Acceleration

Robert placed a rock in a string and spanned it circularly with constant speed. If the string breaks while in motion, in which direction will the rock move?

• The rock will move towards the center of the circular path.

• The rock will move in a straight line away from the center.

• The rock will move along the path of the tangential velocity.

• The rock will move along the circular path for a few more seconds.

A jogger is running around the Quezon City Memorial Circle. He is 2 km away from the center, while having a centripetal acceleration of 2 x 10^-2 m/s².

How fast is the jogger moving?

• 0.20 m/s

• 6.32 m/s

• 14.2 m/s

• 17.9 m/s

A jogger is running around the Quezon City Memorial Circle. He is 2 km away from the center, while having a centripetal acceleration of 2 x 10^-2 m/s².

If the jogger’s tangential acceleration at a certain point in his run is equal to 3 x 10^-3 m/s², how much is his total acceleration at that point?

• 0.02 m/s²

• 0.15 m/s²

• 1.00 m/s²

• 2.30 m/s²