Q.1
If an object orbits around a point five metres away in three seconds, what will happen to the speed of the object if the object's orbit is increased to six metres?
  • Stays the same
  • Decrease
  • Increase
  • Impossible to tell
Q.2
Which of the following is an example of uniform circular motion?
  • A ball travelling through space
  • An artificial satellite
  • Racing car
  • All of the above
Q.3
What does increasing the acceleration of an object following uniform circular motion change?
  • Direction of motion
  • Speed of object
  • Both the direction and speed of the object
  • Neither speed nor direction
Q.4
If the centripetal force acting on the Moon were to suddenly stop acting, what would happen to the Moon?
  • It would continue to orbit unaffected
  • It would come crashing to Earth
  • It would go flying off into space
  • It would be swallowed by the black hole that would result
Q.5
An object moving in a circle continuously accelerates towards what?
  • A predefined point outside of the area of the circle
  • A path perpendicular to the surface of the circle
  • The centre of the circle
  • None of the above
Q.6
What can increase the centripetal force required to keep an object in uniform circular motion about a point?
  • The mass of the object
  • The speed of the object
  • The radius of the orbit
  • All of the above
Q.7
If a driver drives around a bend faster than normal, what happens to the size of the centripetal force needed to keep the car going around the bend?
  • It doesn't change
  • It increases
  • It decreases
  • The car will crash whatever happens
Q.8
Which force acts as the centripetal force responsible for a car travelling around a bend?
  • Friction
  • Electrostatic force
  • Gravity
  • Tension (Pull)
Q.9
Which force acts as the centripetal force responsible for the circular motion of planets orbiting the Sun?
  • Electrostatic force
  • Gravity
  • Tension (Pull)
  • Friction
Q.10
What name is given to the resultant force that acts towards the centre of a circle?
  • Centrifugal
  • Centripetal
  • Centipede
  • Centimetre
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