Question

Stick D is in a hurry to get to his next class. If he has a mass of 75 kg and is traveling 2 m/s, what is his kinetic energy? (show work)

Answer 1

Answer:

150 joule

Explanation:

Just Use Formula

Kinetic Energy(k.E) = 1/2 Mass(m) × (velocity)²(v)

Units :

You can use according to question here S. I i.e k.E is joule , m in kg and v in m/sec will be used

Calculation :

m = 75 kg

v = 2 m/s

As I know,

K.E= 1/2 mv²

= 1/2 × 75 × 2² J

= 1/2 × 75 × 4 J

= 75 × 2 J

= 150 J

Therefore the required K.E is 150 J

Answer 2

Answer:

Given :-

• A mass of 75 kg and it is travelling 2 m/s.

To Find :-

• What is the kinetic energy.

Formula Used :-

$\boxed{\bold{\large{K.E\: =\: \dfrac{1}{2} m{v}^{2}}}}$

where,

• K.E = Kinetic energy
• m = Mass
• v = Velocity

Solution :-

Given :

• Mass = 75 kg
• Velocity = 2 m/s

According to the question by using the formula we get,

⇒ K.E = $\dfrac{1}{2} \times 75 \times {(2)}^{2}$

⇒ K.E = $\dfrac{1}{2} \times 75 \times 4$

⇒ K.E = $\dfrac{300}{2}$

⇒ K.E = $\dfrac{\cancel{300}}{\cancel{2}}$

➠ K.E = 150 J

$\therefore$ The kinetic energy is 150 J .