Q.1
If an object is spinning around on a string and the string was suddenly cut, the object would move in a
  • curved path
  • straight line
Q.2
When an object is moving in a circle, its linear velocity is often called its __________ velocity.
  • centripetal
  • tangential
  • gravitational
  • centrifugal
Q.3
What happens to the centripetal force exerted on an object if you triple the velocity?
  • it increases to 3X
  • it decreases to 6X
  • it increases to 6X
  • it increases to 9X
Q.4
What happens if you let go of the string when you spin the stopper around your head?
  • the stopper continues moving in a circle
  • the stopper moves in a straight line
Q.5
Which statement is true about an object that is traveling in uniform circular motion?
  • The speed of the object varies.
  • The net force on the object is directed toward the center of the circular path.
  • The direction of the object's velocity is constant.
  • The net force on the object is directed away from the center of the circular path.
Q.6
A race car completes three laps of a circular track with a radius ofm in 9.0 seconds. Determine the speed of the car.
  • 3.9 m/s
  • 73.3 m/s
  • 24.4 m/s
  • 1.0 m/s
Q.7
What force keeps an object moving in a circle?
  • centripetal force (inward)
  • centrifugal force (outward)
Q.8
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
Q.9
An object moves with a constant speed ofm/s on a circular track of radiusm. What is the magnitude of the acceleration of the object? A) zero B) 0.m/s C) 5.0 m/sD) 6.0 m/s2
  • A
  • B
  • C
  • D
0 h : 0 m : 1 s