Quiz 1 General Physics 1

GENERAL PHYSICS 1 QUIZ NO.
I. MULTIPLE CHOICE: Read and understand each item and choose the letter of the correct answer.
Write your answers on a separate sheet of paper. (1 point each)
1. Which is NOT a unit of length?

a. Angstrom b. Hertz c. kilometer d. meter
2. Which of the following is NOT a scalar quantity?
a. Area b. mass c. weight d. specific gravity
3. Which of the following is a vector quantity?
a. Chemical Energy b. Electricity c. Pressure d. Impulse
4. When vectors A and B are added together to form vector C the relationship between the magnitudes of
the vectors is given by: A2 + B2= C2. Which statement concerning these vectors is true?
a. A and B must be at right angles to each other
b. A and B must be parallel
c. A and B could have any orientation relative to each other
d. A and B could be antiparallel
5. The x and y components of a displacement vector are -3.00 m and +4.00 m, respectively. What angle
does this vector make with the positive x-axis?
a. 233˚ b. 127˚ c. -53˚ d. 53˚
6. What is the minimum resultant possible when adding 3-N force to an 8-N force?
a. 11 N b. 8 N c. 5 N d. 3 N
7. A boat leaves a harbor and sails 1.1 km in the direction 75˚ north of east, where the captain stops. A
short time later, the boat sails 1.8 km in the direction 15˚ south of east. What is the magnitude of the
resultant displacement?
a. 2.1 km b. 1.5 km c. 2.9 km d. 1.2 km
8. how many significant figures are in the number 069.000010320?
a. 10 b. 11 c. 5 d. 12
9. What is the sum of 40.22 m, 68.2540 m, and 1024.01. Apply rules in significant figures.
a. 1132. 4840 m b. 1132.48 m c. 1132.5 m d. 1132.484 m
10. What is the product of 2.5 m, 730.01 m, and 13.00 m . Apply rules in significant
figures. a. 23 725.325 m3 b. 23 725.3 m3 c. 24 000.00 m3
d. 24 000 m3
11. Dagul bought a tank whose dimensions are 40 cm, 82.32 cm and 15.65 cm. What is the volume (in
cubic inches) of water that can be stored in the tank?
a. 51 532.32 in3 b. 20 288.31 in3 c. 7 987.53 in3 d. 3 144.70 in3
12. Change 430 milligrams to grams
a. 4.30 x 10-1 g
b. 0.43 x 10-1 g
c. 4.30 x 102 g
d. 4.30 x 103 g
13. Pheromone is a substance emitted by ants while they travel so that others may be able to follow
exactly the same direction as the others took. If a zoologist is to measure the distance an ant
travels and in what particular direction does it take, how would this quantity be classified?
a. Equilibrant b. Magnitude c. Scalar d. Vector
14. Among the given units, which unit for length is the smallest?
a. μm b. Mm c. nm d. pm
15. Which of the following choices is equivalent to 248 m?
a. 2.48 x 101 m b. 2.48 x 102 m c. 24.8 x 10-1 m d. 24.8 x 10-2 m

16. To determine the height of a bridge above the water, a person drops a stone and measures the time it
takes for it to hit the water. If the height of the bridge is 41 m, how long will it take for the stone to hit
the water? Neglect air resistance.
A. 2.3 s B. 2.6 s C. 2.9 s D. 3.2 s
17. A car increases its forward velocity uniformly from 40 m/s to 80 m/s while traveling a distance of 200 m.
What is its acceleration during this time?
A. 8.0 m/s2 B. 9.6 m/s2 C. 12 m/s2 D. 24 m/s2
18. Which one of the following pairs of units may NOT be added together, even after the appropriate
unit conversions have been made?
a. grams and milligrams
b. slugs and kilograms
c. miles and kilometers
d. kilograms and kilometers
19. A force F1 of magnitude 2.0 N and directed due east is exerted on an object. A second force exerted on
the object is F2 = 2.0 N, due north. What is the magnitude and direction of a third force, F3, which must
be exerted on the object so that the resultant force is zero?
a. 1.4 N, 45 degrees North of East
b. 1.4 N, 45 degrees South of East
c. 2.8 N, 45 degrees North of East
d. 2.8 N, 45 degrees South of West
20. A boat leaves a harbor and sails 1.1 km in the direction 75˚ north of east, where the captain stops. A
short time later, the boat sails 1.8 km in the direction 15˚ south of east. What is the direction of the
resultant displacement?
a. 73.57 degrees, East of North
b. 16.4 degrees, South of East
c. 16.4 degrees, West of North
d. 73.57 degrees West of South
II. PROBLEM SOLVING: Solve the following problems. SHOW YOUR SOLUTION.
1. Layla walks 250 m, 30° East of North, then 175 m directly east. Find the resultant
displacement vector. Round off your final answer into two decimal places. (5 points)
2. Find the resultant vector of the coplanar concurrent force system shown. (5 points)
3. A stone is vertically thrown upward at 10 m/s. (a) How long will it take the stone to return to the
point of release? (b) What will its velocity be when it hits the thrower's hand? (c) How high will it
rise? (10 points)
4. Junjun is standing at a window 6m in height, watches a falling object pass by the window in 0.4
seconds. Neglecting height of Junjun, what would be the height above the top of the window the
object was released? (5 points)
5. A ball is projected at 15 m/s vertically upward from the edge of a cliff 60 m high. Find the ball
velocity as it strikes the ground? HINT: The velocity of the ball when it’s below 60 meters from the
release point is unknown. (5 points)
ANSWERS TEST I ANSWERS TEST II
1. B 1. Ax = 250 cos (60°) = 125 m R = √ ( 300 ) +2( 216.51 ) 2
Ay = 250 sin (60°) = 216.51 m R = 369.97 m

2. C
Bx = 175 cos (0°) = 175 m
3. D By = 175 sin (0°) = 0 m
4. A Rx = 125 + 175 = 300 m
Ry = 216.51 + 0 = 216.51 m
5. D
6. C 2. Ax = 180 cos (335°) = 163.14 N Rx = 163.14 + 75 + (-80.60) + 0 = 157.54 N

Ay = 180 sin (335°) = -76.07 N Ry = (-76.07) + 129.90 + (-50) + (-100) = -96.17 N
7. A
Bx = 150 cos (60°) = 75 N R = √ ( 157.54 ) +2(−96.17 ) 2
8. B By = 150 sin (60°) = 129.90 N R = 184.57 N
9. B Cx = 100 cos (210°) = -86.60 N

Cy = 100 sin (210°) = -50 N
10. D
Dx = 100 cos (270°) = 0 N
11. A Dy = 100 sin (270°) = -100 N
12. A 3A. vf = vi + a t 3C.

0 = 10 m/s + (-9.81 m/s2) t h = v0 sin2θ / 2g
13. B t = 1.02 seconds h = (10 m/s) sin (90) 2 / (2) (9.8)
t1 + t2 = 2.04 s h = 49 m
14. D
15. B 3B. d = (vf 2- vi2 / 2a)

d = (02- 102 / (2) (-9.81)
16. C d = 5.10 m
vf 2 = vi2 + 2 a d
17. C vf 2 = 0 + 2 (9.81) (5.10)
vf = 10 m/s
18. D
19. D
20. B 4. d = vi t + 2 a t
d = (0) (0.4) +2 (9.81) (0.4)
d = 7.85 m
5. v = vi + at
v = 15 + (9.81) (2.29)
v = 37.46 m/s

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GENERAL PHYSICS 1 QUIZ NO.

1. Which is NOT a unit of length?

a. 2.48 x 101 m b. 2.48 x 102 m c. 24.8 x 10-1 m d. 24.8 x 10-2 m

1. B 1. Ax = 250 cos (60°) = 125 m R = √ ( 300 ) +2( 216.51 ) 2

Ay = 250 sin (60°) = 216.51 m R = 369.97 m

6. C 2. Ax = 180 cos (335°) = 163.14 N Rx = 163.14 + 75 + (-80.60) + 0 = 157.54 N

8. B By = 150 sin (60°) = 129.90 N R = 184.57 N

9. B Cx = 100 cos (210°) = -86.60 N

12. A 3A. vf = vi + a t 3C.

15. B 3B. d = (vf 2- vi2 / 2a)

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