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WorksheetsCOMPETENCE TEST
Total questions: 20
Worksheet time: 15mins
How much force is needed to accelerate a 2 kg physics book to an acceleration of 6 m/s2?
36 N
12 N
3 N
0.33 N
24 N
Using the slope of the line in the graph provided, determine how much FORCE was required to accelerate this object by a rate of 2m/s2.
0.5 N
2N
2.5 N
A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N s.
-2.5
-10
-18
-45
A 2200kg car travelling at 30m/s collides with another 2200kg car that is at rest. The two bumpers lock and he cars move forward together. What is their final velocity?
30 m/s
15 m/s
0 m/s
12.5 m/s
When you sneeze you release tiny (mostly) water droplets. These droplets can travel at extream speeds from 75 km/hr to 1045 km/hr. Let's assume that you sneeze 0.549 g of droplets at a speed of 44.7 m/s. What is the momentum of the sneeze?
24.5 kg m/s
159 kg m/s
0.0245 kg m/s
0.159 kg m/s
The following graph models the motion of a car.
What is the car’s displacement from t = 0-10 seconds?
64 meters
80 meters
72 meters
100 meters
A tuning fork vibrating in air produces sound waves. These waves are best classified as
Transverse, because the air molecules are vibrating parallel to the direction of wave motion
Transverse, because the air molecules are vibrating perpendicular to the direction of wave motion
Longitudinal, because the air molecules are vibrating parallel to the direction of wave motion
Longitudinal, because the air molecules are vibrating perpendicular to the direction of wave motion
Consider four charges, A, B, C, D, which exist in a region of space. Charge A attracts B, but B repels C. Charge C repels D, and D is positively charged. What is the sign of charge A?
Negative
Positive
Neutral
All of the charges are positive
An emission spectrum is produced when
Electrons in an excited gas fall down to a lower energy level and release photons
Electrons in an excited gas jump up to a higher energy level and absorb photons
Electrons are released from the outer orbitals of an excited gas
An unstable nucleus releases energy
Which one of the following traits or behaviors is an indicator that light is a wave?
Light occupies space.
Light travels at enormous speeds.
Light particles possess mass.
Light is observed to undergo diffraction and interference
How is the motion of a body affected by balanced and unbalanced forces acting on it?
A
B
C
D
A truck weighing 2500 kg and moving with a velocity of 21 ms-1 collides with stationary car weighing 1000 kg. The truck and the car move together after the impact. Calculate their common velocity.
15 ms–1
5 ms–1
10 ms–1
20 ms–1
A charged particle with velocity 2×103 m/s passes undeflected through electric and magnetic field intensity. Magnetic field is 1.5 T. The electric field intensity would be
2×103 N/C
1.5×103 N/C
3×103 N/C
4/3×10–3 N/C
The magnetic flux linked with a coil is changed from 1 weber to 0.1 weber in 0.1 sec. the induced e.m.f is:
9V
0.009V
10V
1/9V
A power station generates 600 MW of electrical power which is fed to a transmission line. If the input voltage is 300 KV, then what current would flow in the transmission line?
5 × 103 A
10 × 103 A
2 × 103 A
7 × 103 A
Inertia is a quantity which depends solely upon:
velocity.
mass.
direction.
acceleration..
Which of the following does the illustration depict?
an electric field
a magnetic field
a carbon atom
a water molecule
Which of the following IS NOT a use of electromagnets.
the strip on a credit card
a component of a computer hard drive
a component of audio cassettes and video-cassettes
the speaker in a cell phone
