A.G.B.U
MANOOGIAN-DEMIRDJIAN
SCHOOL
12TH GRADE – HONORS PHYSICS
OLD TEST # 1
January 25, 2017
Student Name (Print): __________________________________
Student Name (Sign): ___________________________________
Instructions: Answer the following 7 questions after reading each one
carefully. If you use the back of any page, please indicate with an arrow that
you are doing so. Calculators are allowed. When solving problems having
to do with angles, please make sure that your calculator is in the correct
mode (degrees vs. radians). Make sure you round all numerical answers to
the 2nd decimal place. You must show all of your work for full credit. Good
Luck!
1) Two students (John and Jenny) walk in opposite directions towards one
another along a straight path, at constant speed. John travels 1.00 m/s while
Jenny travels 0.75 m/s. John is moving west.
(a) What is Jenny’s velocity? (2 Points)
(b) If Jenny is 60 m away from John, how much time will it take them to
cross paths? (4 Points)
(c) After crossing paths, how much time will it take before they are 30 m
apart from one another? (4 Points)
(d) Recall that when John and Jenny started walking, they were 60 m apart
from one another. Considering the origin as being halfway between John
and Jenny, sketch a 10 second position-time graph for John, and sketch a 10
second position-time graph for Jenny (you should sketch a total of two
graphs). (4 Points / Graph)
(e) Recall that when John and Jenny started walking, they were 60 m apart
from one another. Considering the origin as being halfway between John
and Jenny, sketch a 10 second velocity-time graph for John, and sketch a 10
second velocity-time graph for Jenny (you should sketch a total of two
graphs). (4 Points / Graph)
2) A car has an initial velocity of - 50 miles/hour, and an acceleration of + 4
miles/hour every second.
(a) Is the car initially moving East or West? (2 Points)
(b) How much time will it take the car to come to a complete stop? (4 Points)
(c) Call the answer you find in part (b) to be T *. When t < T*, is the car
speeding up, slowing down, or neither? (2 Points)
(d) Call the answer you find in part (b) to be T*. When t > T*, is the car
speeding up, slowing down, or neither? (2 Points)
(e) Will the car ever obtain a speed of 80 miles/hour? If so, how much time
will it take? (6 Points)
3) A truck uniformly accelerates at + 0.5m/s2. What is the displacement of
the truck after it speeds up from 60 km/hr to 70 km/hr? (6 Points)
4) Susan releases a golf ball and a bowling ball from the top of a building
100 m high. I just want the answers here. You don’t need to show work for
this problem. (2 Points Each)
(a) What is the initial velocity of the golf ball?
(b) What is the initial velocity of the bowling ball?
(c) With what acceleration will the golf ball be falling?
(d) With what acceleration will the bowling ball be falling?
(e) Which one of the balls weighs more?
(f) How much time will it take the golf ball to hit the ground?
(g) How much time will it take the bowling ball to hit the ground?
(h) With what speed will the golf ball hit the ground?
(i) With what speed will the bowling ball hit the ground?
5) A volleyball is bumped from a height of 1.5 m so that it moves directly
upward. When it finally reaches the floor, it is moving with a speed of 6
m/s.
a) With what initial velocity was the ball bumped? (6 Points)
b) How much time with the volleyball be in the air after being bumped
before it hits the ground? (6 Points)
6) A patrol vehicle drives 22 km from the base camp at 64 0 south of west. It
then changes its path and drives 14 km in a direction that is 800 north of west
in order to arrive at its destination. Find the patrol vehicle’s displacement
between the base camp and its final destination. (10 Points)
7) Please interpret the graph on the very next page by answering the
following questions.
(a) Does the object start to the left or to the right of the origin (reference
point)? (2 Points)
(b) Is the object initially moving to the right or to the left? (2 Points)
(c) Does the object ever come to a complete stop? (2 Points)
(d) Is the object’s final velocity positive, negative, or neither? (2 Points)
(d) During each of the following time intervals, specify whether the object is
speeding up, slowing down, or that you cannot tell. (4 Points)
 t < T1 :
 T1 < t < T2 :
 T2 < t <T3 :
 t > T3 :