NMAT Physics Base

Question 1 of 34

1. Question

Which of the following is not a result of or does not reflect the theory of relativity?

Length dilation
Time dilation
Mass increase with speed
Mass-energy equivalence

Question 2 of 34

2. Question

Extremely high gravitation cause time to

Speed up
Slow down
Exhibit no change
Fluctuate between fast and slow

Question 3 of 34

3. Question

If Ardy falls from the top of a high building, why is it safer for him to land on a trampoline than on solid ground?

The trampoline abruptly changes his momentum, bringing him to a halt faster and hence, safer.
The trampoline lessens the force of impact by adding its own mass to Ardy’s, thus lessening the acceleration (as per the equation F = ma)
The trampoline lessens the distance he falls through, and hence the final velocity upon impact is less; consequently, the force is less
The trampoline increases the time of contact with Ardy; hence, he experiences less force “disturbed” over a longer time.

Question 4 of 34

4. Question

A heavy stone and a light feather fall side by side in a vacuum. Which of the following statements about the situation is false?

In the vacuum, equal forces of gravity act on both the stone and the feather
The two objects accelerate equally because the ratios of their weights to masses are equal
Air resistance is not present and so the two objects accelerate at the same rate
The two objects have equal masses and equal weights.

I and IV
II and III
IV only
All are true

Question 5 of 34

5. Question

What amount of force does Weng need to move a 10g marble at a rate of 4cm/s² ?

40 N
4 × 10⁶ N
4 × 10^-2 N
4 × 10^-4 N

Question 6 of 34

6. Question

When a car accelerates along a road, what forces actually moves the car forward?

The road pushes the car forward as the tires push backward
Air resistance pushes the car forward as the car ejects a stream of gases backward
The normal force pushes the car forward as friction counteracts this force in a backward direction
The driver’s feet on the gas pedal alone gives enough force to push the car forward

Question 7 of 34

7. Question

Which of the following situation does not demonstrate the concept of angular momentum?

A cat at rest is dropped from an upside down position. It then executes a twist to land upright in a stable position
As the earth’s daily rotation slowly decreases due to the friction of water on the ocean floor, the moon experiences an increase in its rotation. Consequently, the moon moves farther from the earth at the rate of ¼ cm per rotation while its speed of rotation also decreases.
A billiard ball travelling at a certain velocity hits two balls at rest side by side. The two balls move in different directions at an angle to each other while the first ball comes to a rest
Brendan somersaults by assuming a “fetal position” wherein he wraps his arms around his legs close to his torso.

Question 8 of 34

8. Question

A proton is about 2000 times more massive than an electron. The single proton in the nucleus of a hydrogen atom attracts the single electron orbiting around it with a certain amount of electrical force. Relative to this force, how much electrical force does the electron exert on the proton?

Less magnitude of force
Same magnitude of force
Greater magnitude of force
Insufficient data

Question 9 of 34

9. Question

Which of the following statements is false?

The voltage across each resistor in a parallel circuit is the same all throughout the circuit
Magnetic monopoles have not been discovered and likely do not exist
Electric potential energy is the electric potential per amount of charge
Charges flow from an area of higher potential to one of the lower potential

Question 10 of 34

10. Question

Gravitational force and electrostatic force both depend on what?

The same constant
mass
Charge
Distance

Question 11 of 34

11. Question

“Pick a flower on Earth and move the farthest star!” relates to ______

Kepler’s Laws of Planetary Motion
Newton’s Law of Universal Gravitation
Einstein’s General Theory of Relativity
Newton’s Second Law of Motion

Question 12 of 34

12. Question

A man walks with a speed of 7.2 kph inside a rocketship whose velocity is 0.50c, where c is the speed of light. An alien at rest outside the ship observes the man to be moving at a speed of 0.50c + 7.2 kph. The moving man turns on a flashlight and sees the speed of light in the ship to be about 300,000 km/s. What would the alien outside observe the speed of light from the flashlight to be?

Less than 300,000 km/s
Greater than 300,000 km/s
Fluctuating between less and greater than 300,000 km/s
300,000 km/s

Question 13 of 34

13. Question

Angelo is balancing a 3kg book on his palm. He walks 5m across a room, keeping the book steady on his palm. Assuming that 10 m/s², how much work did his palm do on the book?

0 J
15 J
30 J
150 J

Question 14 of 34

14. Question

The two Laws of Gauss may depend on

Magnetic field
Electric field
Area
All of the option

Question 15 of 34

15. Question

If a disturbance that produce a wave moves perpendicular to the direction of wave speed, what kind of wave is it?

Longitudinal
Primary
Transverse
Standing

Question 16 of 34

16. Question

A 25 kg metallic ball is elevated to a height of 1 km. It is released and falls straight down. Let g = 10 m/s². Air resistance is negligible. What is its potential energy after travelling 5 seconds?

25 kJ
31.25 kJ
218.75 kJ
250 kJ

Question 17 of 34

17. Question

A 25 kg metallic ball is elevated to a height of 1 km. It is released and falls straight down. Let g = 10 m/s². Air resistance is negligible. What is its kinetic energy halfway through the trip?

2.5 kJ
125 kJ
250 kJ
125,000 kJ

Question 18 of 34

18. Question

A 25 kg metallic ball is elevated to a height of 1 km. It is released and falls straight down. Let g = 10 m/s². Air resistance is negligible. How many seconds does it take for the ball to hit the ground?

28.2 s
21.2 s
17.6 s
14.1 s

Question 19 of 34

19. Question

In terms of the fundamental quantities, what is the correct unit for the gravitational constant G, 6.67 × 10^-11 ?

m / r²
m³ / (kg.s²)
(N.m²) / kg
Kg³ / (m.r²)

Question 20 of 34

20. Question

Einstein said that observations made in an accelerated frame of reference are indistinguishable from those made in a Newtonian gravitational field. For instance, in a spaceship at rest or in uniform motion far from gravitational influences, everything floats. If the spaceship accelerates, however gravity would be “simulated”. This theory of Einstein is called what?

Special theory of Relativity
Simultaneity
Gravitational Red Shift
Principle of Equivalence

Question 21 of 34

21. Question

Wavelength is inversely proportional to

Wave speed
Frequency
Both of the options

Question 22 of 34

22. Question

What phenomenon results if there is relative motion between an observer and a sound source?

Doppler effect
Gravitational Ref Shift
Harmonic Shift
None of the options

Question 23 of 34

23. Question

Which of the following is not a method through which heat flows from one body to another?

Adsorption
Conduction
Convection
Radiation

Question 24 of 34

24. Question

Which of the following cannot create or induce a magnetic field?

A moving charge
A straight current-carrying conductor
A circular current-carrying loop
None of the option

Question 25 of 34

25. Question

Jannette shoots a projectile from a gun making an angle of 15^o with the horizontal. The initial velocity of the bullet is 100 m/s. Assume that g = 10 m/s². After 5 seconds, what is the bullet’s acceleration along the x-axis?

0.00 m/s²
10.0 m/s²
96.6 m/s²
100 m/s²

Question 26 of 34

26. Question

Jannette shoots a projectile from a gun making an angle of 15^o with the horizontal. The initial velocity of the bullet is 100 m/s. Assume that g = 10 m/s². What is the range of the bullet in an ideal situation?

50.0 m
96.6 m
500 m
966 m

Question 27 of 34

27. Question

Prior to analysing a liver sample, Ceres places it in an Eppendorf tube and proceeds to centrifuge it. If the centrifuge has a diameter of 50 cm and the tube is experiencing an acceleration of 25,600 m/s² towards the center of the machine what speed is the tube under-going as it rotates?

80 m/s
510 m/s
100 m/s
6400 m/s

Question 28 of 34

28. Question

Krista places a clock inside a moving vehicle. For an observer at rest outside the vehicle, the clock would

Run at the same rate as a clock at rest
Run faster than a clock at rest
Run slower than a clock at rest
Fluctuate between running fast and running slow

Question 29 of 34

29. Question

A small object is places 75 cm from a double-convex glass lens whose focal length is 30 cm. What is the image distance?

45 cm
50 cm
75 cm
90 cm

Question 30 of 34

30. Question

In terms of q (a ramp’s maximum angle of inclination before an object overcomes static friction and begins to slide down), what will be the value of the co-efficient of static friction, mS?

cos q
sin q
tan q
cosec q

Question 31 of 34

31. Question

A 2.0 m, 50 N uniform metal rod is to be supported at 2 points by equal upward forces. A 25kg object is balanced at the left end of the rod, and a 10 kg object is balanced at the right end. If one of the supporting forces is to be placed 1.1 m from the right end, how far from the left end should the other support be so that the rod is in equilibrium horizontally? Take g = 10 m/s².

0.3125 m
0.625 m
15 cm
35 cm

Question 32 of 34

32. Question

At some point in a planet’s orbit around the sun, it will be closest to the sun. This distance od nearest approach is called the

Apogee
Penumbra
Perigee
Umbra

Question 33 of 34

33. Question

Who unified electricity and optics with his electromagnetic theory of light?

Hertz
Maxwell
Planck
Wien

Question 34 of 34

34. Question

A light beam strikes a rare gemstone. The light beam is refracted at an angle of 20^o. If the index of refraction of the gem is 1.4619, approximately what is the angle of incidence? (Sin 10^o @ 0.1736; cos 10^o @ 0.9848)

60^o
45^o
40^o
30^o