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A block of mass 10kg is at rest on a fri...

A block of mass `10kg` is at rest on a frictionless wedge. Angle of inclination of wedge is `37^(@)`. Wedge is moved towards left with a constant acceleration so that `10kg` block remains in equilibrium as shown in diagram. Mass of wedge is `20kg`. Select the CORRECT statements(s):

A

Rate of change of momentum of system (block + wedge) is equal to `215N`

B

`a=7.5m//s^(2)`

C

Kinetic energy of block is increasing with rate `562.5t`, where `t` is time in sec.

D

Work done by normal on the wedge is negative.

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