Question

A car expends an energy of 2500J while moving at a speed of 50m/s.what is the mass of car.​

Answer 1

★ Given ★

• Kinetic Energy (K.E) = 2500 J
• Velocity (v) = 50 m/s

★ To Find ★

• Mass (m) = ?

✯ Solution ✯

Here, the car is currently moving so this energy is Kinetic energy

Now, solving it

★ Formula Used ★

• K.E = ½ mv²

Subsituting Values

⎆ 2500 = ½ × m × (50)²

⎆ 2500 = ½ × m × 2500

⎆ 2500 = ½ × 2500 m

⎆ 2500 = 1250 m

⎆ 1250 m = 2500

⎆ ²⁵⁰⁰/₁₂₅₀

⎆ m = 2

Thus, we got the mass of car 2 kg

Answer 2

Answer :-

Given :-

• Kinetic energy, K.E. = 2500 J
• Velocity, v = 50 m/s

To Find :-

• Mass of car

Solution :-

• K.E = 2500 J
• v = 50 m/s

Substituting the value in formula :-

K.E. = ½ mv²

2500 = ½ × m × (50)²

2500 = 1250 × m

m = 2500/1250

m = 2 kg

Mass of car = 2 kg