NMAT Physics Base

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

Which of the following statements is false?

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

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?

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

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?

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

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?

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.

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

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

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?

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?

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

Wavelength is inversely proportional to

Gravitational force and electrostatic force both depend on what?

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

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)

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?

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

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?

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?

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?

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

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

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

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

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

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?

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

The two Laws of Gauss may depend on

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?

Extremely high gravitation cause time to

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

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?