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WorksheetsLong Test
Total questions: 42
Worksheet time: 42mins
Name
Class
Date
1.
Name: (RAPIZ, Jeth Martin B.)
4 lines
2.
Before I begin this test, I solemnly pledge that:
I will answer each question with honesty and integrity.
I will not cheat, copy, or seek unfair help in any way.
I will take this test seriously, giving my best effort as a true student of science.
I understand that my actions reflect my character, and that God is watching me even when no one else is.
I choose to do what is right, to honor my teachers, my school, and my faith.
So help me, God.
a)
Yes, I promise to answer honestly and without cheating.
b)
No, I do not agree to the pledge
3.
A rescue worker pulls a 100-kg victim horizontally on a sled. The rope tension is 250 N and the sled accelerates at 1.5 m/s². What is the frictional force?
a)
100 N
b)
150 N
c)
250 N
d)
400 N
e)
85 N
4.
A 10-kg box remains at rest although a student pushes it with 20 N. What force keeps it from moving?
a)
Kinetic friction
b)
Normal force
c)
Static friction
d)
Air resistance
e)
Weight
5.
A 1,500-kg car moving at constant speed on level road has 900 N friction opposing motion. The net force is?
a)
900 N forward
b)
900 N backward
c)
zero
d)
1,800 N forward
e)
depends on weight
6.
A tablecloth is quickly pulled from under dishes without moving them. Which law explains this?
a)
Second
b)
Third
c)
Universal gravitation
d)
First
e)
Law of momentum
7.
A skydiver falls and eventually moves at constant velocity because?
a)
Air resistance becomes zero
b)
Gravity stops acting
c)
Air resistance equals weight
d)
Weight increases with time
e)
Air drag exceeds gravity
8.
A 5-kg object experiences two forces: 20 N east and 15 N north. What is the magnitude of the net force?
a)
5 N
b)
10 N
c)
25 N
d)
35 N
e)
none of these
9.
A student believes that invisible forces can still cause motion, just as gravity acts invisibly. Which statement best connects physics to this idea?
a)
Only visible forces cause motion
b)
Invisible forces have no effect
c)
Forces can act even without contact
d)
Only friction can act at a distance
e)
Net force is always zero
10.
Which quantity changes when a constant net force acts on an object?
a)
Mass
b)
Weight
c)
Acceleration
d)
Inertia
e)
Time
11.
A 2-kg ball is thrown upward at 20 m/s. Ignoring air resistance, what is its acceleration at the top of its path?
a)
0 m/s²
b)
9.8 m/s² upward
c)
9.8 m/s² downward
d)
19.6 m/s²
e)
depends on velocity
12.
Two students push on opposite sides of a door with equal forces. The door doesn't move. Which is true?
a)
Net force ≠ 0
b)
Forces unbalanced
c)
Acceleration present
d)
Forces balanced
e)
Motion increases
13.
A 400-N crate requires 160 N to start sliding. What is μₛ?
a)
0.25
b)
0.3
c)
0.35
d)
0.4
e)
0.45
14.
If a 400-N crate from the previous question continues sliding with 120 N, what is μₖ ?
a)
0.25
b)
0.3
c)
0.35
d)
0.4
e)
0.5
15.
A box slides faster when the floor is waxed because?
a)
μₖ decreases
b)
μₛ increases
c)
weight decreases
d)
inertia increases
e)
air drag grows
16.
A box is pushed across three different surfaces using the same force. It moves farthest on the smoothest surface because?
a)
Friction increases on smooth surfaces
b)
The coefficient of friction is smaller
c)
Normal force is zero
d)
Mass decreases
e)
Static friction dominates motion
17.
Friction converts part of mechanical energy into?
a)
Light
b)
Magnetic energy
c)
Sound only
d)
Heat
e)
Potential energy
18.
Which change increases friction?
a)
Use lubricant
b)
Polish surfaces
c)
Decrease normal force
d)
Add rough sand
e)
Reduce weight
19.
When pushing a heavy cabinet that won't move, which statement is true?
a)
Static friction adjusts up to a maximum value
b)
Friction is constant
c)
No force acts
d)
Kinetic friction opposes motion
e)
Weight becomes zero
20.
A 15-kg box slides down a 25° ramp with μₖ= 0.3. Which of the following decreases its acceleration?
a)
Increasing ramp angle
b)
Decreasing μₖ
c)
Increasing μₖ
d)
Removing gravity
e)
Reducing weight
21.
Two masses 4 kg and 6 kg are 2 m apart. Doubling both masses makes the force?
a)
Same
b)
2x
c)
4x
d)
6x
e)
8x
22.
If distance doubles between two planets, gravitational force becomes?
a)
1/2
b)
1/3
c)
1/4
d)
1/8
e)
4x
23.
The reason satellites stay in orbit is?
a)
Gravity pulls them inward while inertia keeps them moving tangentially
b)
Gravity is absent
c)
Air drag supports them
d)
Weightless conditions remove forces
e)
None of the above
24.
The gravitational force between two bodies is always?
a)
Repulsive
b)
Attractive
c)
Zero
d)
Vertical only
e)
Perpendicular to distance
25.
The acceleration due to gravity on the Moon is 1/6 that on Earth. An astronaut's mass there is?
a)
1/6 smaller
b)
6× large
c)
same
d)
zero
e)
depends on suit
26.
The gravitational attraction between two planets becomes strongest when?
a)
Their masses are small and far apart
b)
Their masses are large and close together
c)
Their masses are large and far apart
d)
One mass is large and one small
e)
They have equal densities
27.
Newton discovered gravitation by analyzing?
a)
Kepler's laws and falling apples
b)
Frictional forces
c)
Magnetic fields
d)
Weight of water
e)
Rotation of Earth only
28.
A 2-kg object moving at 3 m/s has momentum?
a)
1 kg·m/s
b)
3 kg·m/s
c)
4 kg·m/s
d)
5 kg·m/s
e)
6 kg·m/s
29.
When a net impulse acts on an object, it causes a change in?
a)
Mass
b)
Weight
c)
Velocity
d)
Momentum
e)
Time
30.
A soccer player exerts a force of 60 N on a 0.5-kg ball for 0.20 s. What is the ball’s change in momentum?
a)
6 kg·m/s
b)
9 kg·m/s
c)
10 kg·m/s
d)
12 kg·m/s
e)
15 kg·m/s
31.
A car of 1,000 kg moving at 10 m/s hits a 2,000 kg truck at rest. They stick together. Their common velocity is?
a)
2 m/s
b)
3.3 m/s
c)
5 m/s
d)
6.6 m/s
e)
10 m/s
32.
A bat strikes a 0.15-kg ball changing its velocity from -20 m/s to +30 m/s in 0.01 s. What is the average force?
a)
50 N
b)
150 N
c)
500 N
d)
750 N
e)
150 N opposite
33.
Two skaters push apart; the heavier one moves slower but momentum magnitudes are equal. This demonstrates?
a)
Newton's Second Law
b)
Third Law
c)
First Law
d)
Gravitation
e)
Impulse
34.
A truck stops in twice the time by using less braking force. Impulse remains equal to change in?
a)
Energy
b)
Force
c)
Momentum
d)
Friction
e)
Acceleration
35.
The quantity force x time equals?
a)
Work
b)
Power
c)
Energy
d)
Impulse
e)
Torque
36.
A 60-kg athlete running east at 8 m/s collides with a 40-kg athlete running west at 6 m/s; they hold together. Find their final velocity.
a)
0.6 m/s east
b)
0.6 m/s west
c)
1 m/s east
d)
2 m/s west
e)
zero
37.
A baseball player catches a fast-moving ball by moving his glove backward during the catch. This reduces the force on his hand because?
a)
Momentum increases
b)
Time of impact increases
c)
The ball's mass decreases
d)
Force and time are unrelated
e)
Kinetic energy is constant
38.
A block is pushed along a rough horizontal surface at constant velocity. The pulling force equals?
a)
Weight
b)
Normal force
c)
Kinetic friction
d)
Static friction
e)
Net force
39.
Which situation best illustrates Newton's Second Law in everyday life?
a)
A stationary book on a table
b)
A car speeding up when the gas pedal is pressed
c)
Two people pushing opposite directions equally
d)
The moon orbiting Earth
e)
A door resisting motion
40.
A moving truck suddenly halts; boxes slide forward. Which statement best explains this?
a)
Net force acts backward
b)
Friction pushes boxes forward
c)
Boxes continue motion due to inertia
d)
Gravity changes
e)
Air resistance decreases
41.
A basketball player catches a fast-moving ball by bending her arms backward, increasing contact time and reducing force. This demonstrates?
a)
Conservation of energy
b)
Impulse-momentum theorem
c)
Static equilibrium
d)
Frictional force
e)
Uniform motion
42.
Two identical carts collide head-on and stick together. Before collision, one moves at +3 m/s and the other at -3 m/s. After collision, their total momentum is?
a)
6 kg·m/s forward
b)
6 kg·m/s backward
c)
Zero
d)
3 kg·m/s forward
e)
3 kg·m/s backward
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