3G2 Science Physics - Formula Revision

Front

What is the formula for calculating average speed?

Back

v = d / t

Answer explanation

Average speed = distance ÷ time.

Front

A runner covers 150 m in 30 s at constant speed. What is the average speed?

Back

5.0 m/s

Answer explanation

v = d/t = 150/30 = 5.0 m/s.

Front

A walker moves at 3 m/s for a straight-line distance of 900 m. How long does the journey take?

Back

300.0 s

Answer explanation

t = d/v = 900/3 = 300.0 s.

Front

Formula for acceleration in terms of initial velocity (u), final velocity (v), and time (t)?

Back

a = (v - u) / t

Answer explanation

Acceleration = change in velocity ÷ time.

Front

A car speeds up from 10 m/s to 22 m/s in 4 s. What is its acceleration?

Back

3.0 m/s²

Answer explanation

a = (v − u)/t = (22 − 10)/4 = 3.0 m/s².

Front

A trolley starts at 4 m/s and accelerates uniformly at 1.5 m/s² for 8 s. What is its final velocity v?

Back

16.0 m/s

Answer explanation

v = u + at = 4 + (1.5)(8) = 16.0 m/s.

Front

What is the formula relating resultant force, mass and acceleration?

Back

F = ma

Answer explanation

Newton's second law: F = m × a.

Front

A 60 kg cart accelerates at 0.5 m/s² on a smooth floor. What is the resultant force?

Back

30.0 N

Answer explanation

F = ma = 60 × 0.5 = 30.0 N.

Front

A constant resultant force of 96 N produces an acceleration of 3 m/s². What is the mass of the object?

Back

32.0 kg

Answer explanation

m = F/a = 96/3 = 32.0 kg.

Front

Formula for weight in a gravitational field of strength g?

Back

W = mg

Answer explanation

Weight is the gravitational force: W = m × g.