Question

1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as fast around the circle)?

a) force doubles
b) force quadruples
c) force is halved
d) force is quartered

my answer: c

2. Which is true
a) the acceleration of free fall objects on Earth is approximately 9.8 m/s^2 [down]
b) heavier objects in free fall accelerate faster than light objects
c) In projectile motion, the initial speed is always equal to the final speed
d) none are true

my answer: a

3. In a pulley problem involving an inclined plane:
a) the gravity needs to be resolved into components
b) the tension needs to be resolved into components
c) the friction needs to be resolved into components
d) the direction convention is the same for both blocks

my answer: c