SUMMATIVE TEST IN GENERAL PHYSICS-answer.pptx.pdf

Reviewer for summative test in general physics

1. SUMMATIVE TEST IN
GENERAL PHYSICS
JANUARY 18, 2024

2.  
a.Velocity = 0; acceleration = 0
b.velocity = v
i
sin θ; acceleration = 0
c.Velocity = 0; acceleration = -g
d.velocity = v
i
cos θ; acceleration = -g

3. Which two quantities are needed to determine the
average velocity of an object?
a.Displacement and acceleration
b.distance and elapsed time
c.Displacement and elapsed time
d.initial speed and final speed

4. What does a horizontal line on a velocity-time
graph represent?
a.No motion at all
b.uniformly accelerated motion
c.Uniform motion
d.uniformly decelerated motion

5. What does a horizontal line on a displacement
-time graph represent?
a.No motion at all
b.uniformly accelerated motion
c.Uniform motion
d.uniformly decelerated motion

6. What does the slope of the line tangent to a point on a
displacement – time graph for a uniformly accelerated motion
give us?
a.Acceleration
b.initial velocity
c.Average velocity
d.instantaneous velocity

7. A girl is riding a bicycle at a constant speed when she dropped
the ball. Which sets of graphs represents the horizontal motion
of the ball?
a. c.



b. d.
c.

8. A ball is thrown upward at an angle of 60
o
with the horizontal. In
the absence of the air resistance, its range would be less than
that of a projectile thrown at an angle of .
a.10 degrees
b.30 degrees
c.43 degrees
d.70 degrees

9. A girl runs around a circular track of radius 65 m at a speed of 2
m/s. what is her displacement after finishing one round?
a.0 m
b.65 m
c.130 m
d.408 m

10. A boat sails at 12 m/s across a river flowing due south at 5 m/s.
What is the magnitude of the resultant velocity of the boat?
a.7.0 m/s
b.8.5 m/s
c.13.0 m/s
d.17.0 m/s

11. A ball was thrown vertically upward and returned to the
hand after 2.0 s. What was the maximum height reached
by the ball?
a.4.9 m
b.9.8 m
c.19.6 m
d.29.4 m

12. Which causes acceleration?
a.Inertia
b.nonzero net force
c.speed
d.velocity

13. Which principle explains why we need to wear
seat belts?
a.Impulse-momentum theorem
b.law of acceleration
c.Law of inertia
d.law of interaction

14. Which of the following statement is considered as an
alternative statement of the second law of Newton on motion?
a.Impulse-momentum theorem
b.law of acceleration
c.Law of inertia
d.law of interaction

15. What concept states that there should be no
unbalanced force acting on a body?
a.Impulse-momentum theorem
b.coefficient of static friction
c.Law of inertia
d.first condition of equilibrium

16. For items 15-16: A stone is thrown vertically
up with an initial velocity of 4.9 m/s form the
top of a building that is 52 m high. On its way
down, it misses the top of the building and
goes straight to the ground.

17. What is the maximum height of the stone relative
to the ground?
a.1.2 m
b.4.9 m
c.9.8 m
d.19.8 m

18. What is its time of flight or the total time it is in
air?
a.0.3 s
b.0. 4 s
c.0.5 s
d.3.8 s

19. which of the following velocity that is always changing
but its magnitude may or may not be constant?
a.Centripetal velocity
b.tangential velocity
c.Initial velocity
d.final velocity

20. What happens when the tangential acceleration is
in the same direction with the velocity?
a.The body slows down
b.the body speeds up.
c.The body remains at rest
d.the body moves in an instantaneous direction.

21. A child sits at 3 meters from the axis of a merry-go-round
in an amusement park. If the merry-go-round makes 2
revs in 5.0 seconds, what is its tangential speed?
a.37.68 m/s
b.18.75 m/s
c.11.75 m/s
d.7.5 m/s

22. With the same problem above, what is the
centripetal acceleration of the child?
a.37.68 m/s
b.18.75 m/s
c.11.75 m/s
d.7.5 m/s

23. A hammer drives a nail into a piece of wood.
Which describes an action-reaction pair?
a.The hammer exerts a force on the nail; the wood
exerts a force on the nail.
b.The hammer exerts a force on the nail; the nail
exerts a force on the hammer.
c.The hammer exerts a force on the nail; the hammer
exerts a force on the wood.
d.The nail exerts a force on the hammer; the hammer
exerts a force on the wood.

24. A lady stands on a weighing scale while inside an elevator that
is moving upward at a constant speed. What will be the reading
of the scale?
a.Zero
b.less than her weight
c.Her weight
d.greater than her weight

25. What refers to the tendency of an object to
maintain its state of motion?
a.Acceleration
b.force
c.inertia
d.velocity

26. Which is always true for a body in equilibrium?
a.It is at rest.
b.it is moving at constant velocity.
c.There are no forces acting on it.
d.there is no unbalanced force acting on it.

27. Which force arises from direct physical contact
between two objects?
a.Field force
b.friction
c.fundamental force
d.contact force

Ans.
Friction is accepted since
the other term for contact
force is friction or friction
force.

28. Which of the following does not affect the force of
sliding friction?
a.Area and sliding speed
b.materials of object in contact.
c.Nature of surface of contact
d.normal force pressing the surfaces
together.

29. A student pulls a 10 N block along rough horizontal surface. The
horizontal and the vertical components of the force that he
applies are 4 N and 3 N, respectively. What is the coefficient of
static friction?
a.0.31
b.0.4
c.0.57
d.1.3

30. Which law tells us that the air resistance encountered
by a falling object is proportional to its velocity?
a.Law of acceleration
b.newton’s law of resistance
c.Law of interaction
d. stroke’s law

31. An astronaut weighs 931 N hereon earth. What is
his mass on earth?
a.90 kg
b.93 kg
c.95 kg
d.97 kg

32. Items 30-31, refer to the problem below.
Starting from the church, a procession
must take the following route: 50 m,
north; 40 m east; and 60 m north. To go
back, it must follow the same route but
in the opposite direction.

33. What is the total distance traveled?
a.50 m
b.150 m
c.200 m
d.300 m

34. What is the total displacement?
a.300 m
b.150 m
c.75 m
d.0 m

35. Sonia walks to her school 360 m away at a constant speed of 3.0
m/s. Ten seconds later, his sister, Analiza, follows at a constant
speed of 4.0 m/s. How far is Sonia from school when overtaken
by Analiza?
a.360 m
b.240 m
c.120 m
d.60 m

36. A ball was thrown vertically upward and returned to the
hand after 2.0 seconds. How much time was taken by the
ball to reach its maximum height?
a.0.5 seconds
b.1.0 seconds
c.1.5 seconds
d.2.0 seconds

37. A ball was thrown vertically upward and returned to the hand
after 2.0 seconds , what is the initial velocity was the ball
thrown?
a.-19.6 m/s
b.-9.8 m/s
c.9.8 m/s
d.19.6 m/s

38. Items 35-36: At a roller-skating rink, a
girl pushes a boy, causing the boy to
accelerate at 1.5 m/s
2
to the right.
The masses of the boy and the girl are
60 kg and 50 kg respectively.

39. What is the force exerted by the girl on the boy?
a.50 N to the right
b.70 Nto the right
c.90 Nto the right
d.110 N to the right

40. What is the force exerted by the boy on the girl?
a.50 N to the left
b.70 N to the left
c.90 N to the left
d.110 N to the left

41. A 1.5 kg falling object stops accelerating and continues to
move at constant velocity. What is the amount of the air
resistance encountered by the object?
a.Less than 14.7 N
b.14.7 N
c.Between 0 and 14.7 N
d.greater than 14.7 N

42. An object experiences a change of momentum of 54 kg
m/s in 9 seconds. What is the force causing this change?
a.2 N
b.4 N
c.6 N
d.8 N

43. What term is given to the forces that resists relative motion of
an object through a liquid or of a fluid through another fluid?
a.Normal force
b.kinetic force
c.static force
d.drag force.

44. What kind of friction that is present when there is
a relative motion between the surfaces?
a.Static
b.kinetic
c.rolling
d.fluid

45. A 100.0 kg crate rests on a rough horizontal surface. The coefficient of
static friction and coefficient of kinetic friction are 0.50 and 0.10,
respectively. What is the normal force acting on the crate?
a.100 kg
b.490 N
c.980 N
d.1000 N

46. What is the value of the maximum static friction?
a.100 kg
b.490 N
c.980 N
d.1000 N

47. What horizontal force is needed for the motion of
the crate to impend?
a.100 kg
b.490 N
c. 980 N
d.1000 N

48. What is the value of the kinetic friction?
a.10 N
b.49 N
c.98 N
d.100 N

49. • 

50. What is the angle at which the crate starts to slip
down the ramp?
a.19 degrees
b.24 degrees
c.35 degrees
d.45 degrees

51. What is the angle at which the crate slips down at
constant velocity once motion has started?
a.19 degrees
b.24 degrees
c.35 degrees
d.45 degrees