Tahsili Physics

Question 1

A car accelerates uniformly from rest to 20 m/s in 5 seconds. What is its acceleration?

Accepted Answer

4 m/s²

Answer

Acceleration = (final velocity - initial velocity) / time = (20 - 0) / 5 = 4 m/s². The car increases its velocity by 4 meters per second every second.

Question 2

What is the SI unit of force?

Accepted Answer

Newton

Answer

The Newton (N) is the SI unit of force. 1 N = 1 kg⋅m/s². It is defined as the force needed to accelerate 1 kg of mass by 1 m/s². Named after Sir Isaac Newton.

Question 3

A 5 kg object is lifted 10 meters vertically. How much work is done against gravity? (g = 10 m/s²)

Accepted Answer

500 J

Answer

Work = Force × Distance = mgh = 5 × 10 × 10 = 500 Joules. The force applied equals the weight (mg) and the displacement is the height lifted.

Question 4

What is the frequency of a wave with wavelength 2 meters traveling at 340 m/s?

Accepted Answer

170 Hz

Answer

Using v = fλ: f = v/λ = 340/2 = 170 Hz. This is the frequency of a sound wave with a 2-meter wavelength traveling at the speed of sound in air.

Question 5

According to Ohm's Law, if a circuit has a voltage of 12V and resistance of 4Ω, what is the current?

Accepted Answer

3 A

Answer

Ohm's Law: V = IR, so I = V/R = 12/4 = 3 Amperes. Ohm's Law describes the linear relationship between voltage, current, and resistance in a conductor.

Tahsili Practice Test

Tahsili Practice Test

Tahsili Physics