What is the Kinetic Energy of a 2 kg object moving at a velocity of 12 m/s?
- 288 Joules.
- 24 Joules.
- 144 Joules.
Explanation from PART66Online
Kinetic energy is one half m v squared = 0.5 x 2 x 12 squared = 0.5 x 2 x 144 = 144 J. The 24 J figure is mass times velocity, dropping both the square and the half, while 288 J keeps the square but omits the half.
B
bigbear asked · 23 Jul 2024
COULD SOMEONE PLEASE EXPLAIN?
Community Comments (1)
K
karol288
24 Jan 2025
Ek=0.5*m*v^2
Ek=0.5*2*12^2
Ek=0,5*2*144=144 J
Ek=0.5*2*12^2
Ek=0,5*2*144=144 J
Please Sign In to post a comment.
More discussions in 2. Physics
- A mass of 3kg weighs approximately
- A 4.5 kW electric motor is 90% efficient. How much energy does it use in 20 seconds?
- A pile driver of mass 1000 kg, hits a post 3 m below it. It moves the post 10 mm. Assuming gravity = 10 m/s, what is the kinetic energy of the pile driver?
- What work is done if a force of 100 N moves a body 15 metres?
- A good refrigerant has a
- The point at which an applied force overcomes friction and an object begins to move is the co-efficient of