Version C Test Page 2 df T Questions: (questions (1-4): 10 Points Each &Others;

Question

Version C Test Page 2 df T Questions: (questions (1-4): 10 Points Each &Others; are 20 points each Choose the correct answer of the following and show your work to get full crea 1. A proyectie-fired at an angle ot 45° above the horizontal. Assume tat ar resistanc signticant. While the projectie is in fight, which component of the velocity remain constann rce a. b. c. d. e. Vertical Component Horizontal Component Instantanecus velocity Average velocity None of the above 2. An object is moving on a circular path of radius of meter at a constant rate of 30 rpm,its speed a. 2n m's c r'/2 d.2/3 m/s m/s 3. According to Newton's First Law of motion a moving object that is nct acted on by an unbalanced forco will a. Remain in motion b. Eventually come to a rost c. Change its momentum d. Accelerate e. None of the above A not horizontal forco of 10 N is applied on a 10-kg block on a horizontal surface. The block does not move. The magnitude of friction force developed at the boundary between the black andthe surface is [Assume . . 0.3 and -02] a. 0 b. 10 N c. 19.6 N d. 29.4 N . 98 N 4. Test 2 Version C Page 2 ol 7

Explanation / Answer

1.

Since there is no acceleration in horizontal direction,velocity will be constant

So in Horizontal direction

2.

w=30*2*pi/60=pi

Velocity=w*r=pi^2

So option (b)

3

Will remain in motion

4if it does not move

Frictional force=10N

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