11. What is the force required to accelerate a 2 kg object at a rate of 3 m/s^2?
a) 2 N
b) 3 N
c) 6 N
d) 9 N
12. Which of the following is true about the net force acting on an object in equilibrium?
a) The net force is zero
b) The net force is always positive
c) The net force is always negative
d) The net force is equal to the weight of the object
13. Which of the following is true about terminal velocity?
a) It is the maximum velocity an object can reach while falling
b) It is the velocity at which an object starts to accelerate
c) It is the velocity an object reaches when there is no friction
d) It is the velocity at which an object starts to decelerate
14. Which of the following statements is true about projectile motion?
a) The horizontal component of velocity remains constant
b) The vertical component of velocity remains constant
c) The acceleration is always directed upwards
d) The trajectory is always a straight line
15. Which of the following statements is true about circular motion?
a) The acceleration is always directed towards the center of the circle
b) The speed remains constant
c) The net force is always directed towards the center of the circle
d) The object must be in equilibrium
