Linear Motion Newton’s Second Law Newton’s Third Law of Motion
Answer the following 4 questions
1)
A push on a 2-kg brick accelerates it. Neglecting friction, equally accelerating a 10-kg brick requires
A just as much force.
B 10 times as much force.
C 20 times as much force.
D one-fifth the amount of force.
E …none of the above.
2)
A certain object that weighs 20 N is tossed straight upward into the air. Neglecting air resistance, what is the net force on the object when it reaches its highest point? Is the object in equilibrium at this point? Carefully explain.
3)
A child tosses a ball straight upward with a speed of 26.9 m/s. The ball is caught on the way down at a point 3.7 m above the point from which it was thrown. Determine the speed of the ball when it was caught and the total length of time the ball was in the air. Your solution should include a properly labeled diagram and your choice of sign convention should be clearly stated.
4)
Is it possible for a moving object to reverse its direction of travel while maintaining a constant acceleration? If your answer is yes, provide an example to support your explanation. If your answer is no, carefully explain why.
