What is the kinetic energy (in J) of a body moving at ?
Answer and explanation
Correct answer: C. 18
- Step 1: The kinetic energy of a body in translational motion is given by .
- Step 2: Substitute mass and velocity : .
- Step 3: Evaluating the expression gives .
Answer
18.
Why not the others: 36 computes forgetting the factor; 12 computes momentum ; 9 halves the correct energy.
Practise more Work, energy and power.
Free questions with an explanation for every one, and full timed NEET UG mock tests.
More Work, energy and power questions
- What is the kinetic energy (in J) of a body moving at ?
- What is the kinetic energy (in J) of a body moving at ?
- What is the kinetic energy (in J) of a body moving at ?
- A body of mass falls freely from rest through a height of . What is its speed on reaching the ground? (take…
- What is the kinetic energy (in J) of a body moving at ?
- A body of mass falls freely from rest through a height of . What is its speed on reaching the ground? (take…