Linear and Circular Motion Concepts

What is Newton's first law of motion?

• An object in motion will eventually stop on its own.

• An object will accelerate unless a force is applied.

• An object will change direction only if a force is applied.

• An object will remain at rest or in uniform motion unless acted upon by an external force.

Define average speed and how it is calculated.

• Average speed = Total distance / Total time

• Average speed = Total distance + Total time

• Average speed = Distance per hour

• Average speed = Total time / Total distance

If a car travels 150 km in 3 hours, what is its average speed?

• 40 km/h

• 70 km/h

• 50 km/h

• 60 km/h

What is the formula for acceleration in linear motion?

• a = (v_f - v_i) / t

• a = v_i / t

• a = v_f + v_i

• a = (v_f * v_i) + t

Explain the difference between speed and velocity.

• Speed is always constant; velocity can change direction.

• Speed is scalar; velocity is vector.

• Speed is a measure of distance; velocity is a measure of time.

• Speed can be negative; velocity cannot be negative.

A train accelerates from rest to 60 m/s in 10 seconds. What is its acceleration?

• 6 m/s²

• 10 m/s²

• 8 m/s²

• 4 m/s²

What does uniform linear motion mean?

• Uniform linear motion is motion in a straight line at constant speed.

• Random motion with no specific direction.

• Motion in a circular path at varying speed.

• Movement in a straight line with changing acceleration.

How do you calculate the distance traveled in uniform motion?

• Distance = Speed + Time

• Distance = Time ÷ Speed

• Distance = Speed × Time

• Distance = Speed - Time

What is the definition of uniform circular motion?

• Motion in a straight line at varying speeds.

• Movement in a circular path with changing speed.

• Uniform circular motion is the motion of an object moving at a constant speed in a circular path.

• Any motion that involves rotation around an axis.

What is the relationship between linear speed and angular speed?

• Linear speed is the square of angular speed.

• Angular speed is always greater than linear speed.

• Linear speed is independent of angular speed.

• Linear speed is proportional to angular speed, given by v = r * ω.