AP EAMCET202421 May 2024Evening ShiftPhysicsLaws of MotionActual
A block of metal 4 kg is in rest on a frictionless surface. It was targeted by a jet releasing water of 2 ~kg ~s ⁻¹ at a speed of 10 ~ms ⁻¹ . The acceleration of the block is
Options
- A10 ~ms ⁻²
- B15 ~ms ⁻²
- C20 ~ms ⁻²
- D5 ~ms ⁻²
Correct answer
D. 5 ~ms ⁻²
Step-by-step solution
v =10 ~m / s , dm dt =2 ~kg / s Force applied by jet on the block is F = v ( dm dt )=10 2=20 ~N Acceleration of the block is a = F ~m = 20 4 =5 ~m / s ^2