21 1) Fig. 3-2 indicates the current position of an object traveling at constant

Question

21 1) Fig. 3-2 indicates the current position of an object traveling at constant speed closkwise around the circle. Which arrow best represent the direction the object would travel if the net force on the object was suddenly reduced to zero? A) c) D) E) 2) Fig. 5-2 indicates the current position of an object traveling at constant speed clockwise around the 2) circle. Which arrow best represent the direction of the current acceleration of the object? A) B) D) E) 3) A car goes around a curve at a constant speed. What is the direction of the net force on the car? A) toward the front of the car B) toward the curve's center C) the net force is zero D) away from the curve's center (E) toward the back of the car 4) A ball is tossed vertically upward. When it reaches its highest point (before falling back downward), A) the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is zero. B) the velocity is zero, the acceleration is directed downward, and the force of gravity acting on the ball is directed downward the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is directed downward D) None of the above 5 A block is puled with an applied horizontal force of 5.3 Newtons with a constant velocity of 0.50 m/s The only other force acting in the horizontal direction is Friction. 5 A) The force of friction is a little less than 5.3 N B) The force of friction is a little more than 5,3 N The force of friction must be exactly 5.3 N We need to know the mass of the block to answer the question.

Explanation / Answer

1. (B) the object will move in it's tangential direction.

2. (C) the centeripetal force responsible for particle's circular motion act's towards the center of circle.

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