Name Review
Date
Period
x (m)
70
1. Consider the position vs. time graph at right.
a. Determine the average velocity of the
object.
60
50
40
30
20
b. Write a mathematical equation to describe
the motion of the object.
10
1
2.
3
45
6
7 t()
V
imist
Shown at right is a velocity vs. ti me graph for an object.

Aman tries to push a box of mass 4 kg with a force of 5 n but the box remains stationary if the coefficient of static friction is 0.45, what is the value of the maximum force of friction?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?