BS Physics Fundamentals 1

Question 1

According to Newton's second law, which equation correctly relates net force, mass, and acceleration?

Accepted Answer

F = ma

Answer

Newton's second law states that net force equals mass multiplied by acceleration (F = ma).

Question 2

In projectile motion, what primarily determines the horizontal range of a horizontally launched object (ignoring air resistance)?

Accepted Answer

The time the object is in the air

Answer

Horizontal range equals horizontal velocity multiplied by time of flight, so the time in the air determines how far the object travels horizontally.

Question 3

The work-energy theorem states that the net work done on an object equals:

Accepted Answer

The change in its kinetic energy

Answer

The work-energy theorem establishes that W_net = ΔKE, meaning net work causes a change in an object's kinetic energy.

Question 4

Two objects undergo a perfectly inelastic collision. Which quantity is conserved?

Accepted Answer

Momentum only

Answer

Momentum is conserved in all collisions, but kinetic energy is lost to heat and deformation in a perfectly inelastic collision.

Question 5

If the distance between two masses is doubled, Newton's law of universal gravitation predicts the gravitational force between them becomes:

Accepted Answer

One-quarter as strong

Answer

Gravitational force is inversely proportional to the square of the distance (F ∝ 1/r²), so doubling the distance reduces the force by a factor of four.

BS - Bachelor of Science Practice Test

BS - Bachelor of Science Practice Test

BS Physics Fundamentals 1