Topic 2 Quiz

An object is moving in a circle at a constant speed. Which one of these statements is correct?
1. The velocity is also constant.
2. The direction is constant.
3. The velocity is changing all the time.
4. There is no direction in this movement.
The velocity of an object moving in a circle at a constant speed changes because:
1. the object is slowing down
2. the object is going faster
3. the object is going slower, then faster.
4. the direction is always changing.
The Laws of Physics state that when there is change in velocity, there must be:
1. an acceleration
2. an increase in speed
3. a change of direction
4. a moment
The acceleration due to the change in velocity is the result of:
1. moment
2. force
3. momentum
4. energy
The force(s) involved in circular motion are:
1. centripetal
2. centrifugal
3. both centripetal and centrifugal
4. cetripedal
Which one of these statements is correct about centripetal force?
1. It is a force acting away from the centre of the circular path.
2. It acts in the same direction as the velocity.
3. It is a force acting towards the middle of the circular path.
4. It does not exist.
Compared with the direction of the velocity, what is the direction of the centripetal force?
1. Always 0 degrees
2. Always 45 degrees
3. Varies between 0 and 90 degrees depending on where the object is.
4. Always 90 degrees
Which one of these statements is correct about centrifugal force?
1. It is a force acting away from the centre of the circular path.
2. It acts in the same direction as the velocity
3. It is a force acting towards the middle of the circular path.
4. It does not exist.
A toy plane is moving in a circle and the line holding it suddenly breaks, which one of these statement correctly describes its path immediately after the line breaks?
1. The plane takes a path in a straight line along the radius of the circle.
2. The plane takes a path in a straight line along the tangent of the circle.
3. The plane continues to fly in a circle.
4. The plane flies into the ground.
Which one of these situations is NOT an example of the action of centripetal force?
1. A train going round a long bend.
2. An extreme fairground ride where the ride goes round in a circle.
3. An extreme fairground ride where the ride goes straight up in the air and down again.
4. Riding a bicycle.