حرکیات

Which of these is a vector quantity?

• 1 Time
• 2 Velocity
• 3 Speed
• 4 Distance

A car covers 120 km in 2 hours. What is its average speed?

• 1 120 km/h
• 2 60 km/h
• 3 240 km/h
• 4 40 km/h

A body starts from rest and reaches 20 m/s in 5 s. What is its acceleration?

• 1 2 m/s²
• 2 5 m/s²
• 3 100 m/s²
• 4 4 m/s²

The slope of a distance-time graph gives:

• 1 Acceleration
• 2 Force
• 3 Speed
• 4 Displacement

An object falls freely from rest for 3 s. What is its speed at the end? (g = 10 m/s²)

• 1 90 m/s
• 2 30 m/s
• 3 10 m/s
• 4 20 m/s

The area under a speed-time graph gives:

• 1 Distance travelled
• 2 Force
• 3 Time
• 4 Acceleration

A car moves with a constant speed of 20 m/s. How far does it travel in 5 s?

• 1 200 m
• 2 100 m
• 3 4 m
• 4 25 m

Which equation of motion links v, u, a and t?

• 1 v = u a t
• 2 s = v t
• 3 a = v + u
• 4 v = u + a t

A body moving with uniform velocity has an acceleration of:

• 1 9.8 m/s²
• 2 Zero
• 3 Infinite
• 4 1 m/s²

A stone is thrown upwards. At its highest point its velocity is:

• 1 Negative infinity
• 2 Zero
• 3 Equal to g
• 4 Maximum