The density of a solid object is defined in the rating of the mass of the object

Question

The density of a solid object is defined in the rating of the mass of the object to its volume. The dimension of density is: [M]/[L] [L] 3[M] [M][L] [M][L] justification A 250-kg crate is placed on an adjustable inclined rough, If the crate slides down the incline with an acceleration of 70 m/s 3 when the incline angle is 25degree, then what should the incline angle be for the crate to slide down the plane it constant speed? (g - 908 m/s 3). 12 degree 21 degree 25 degree 29 degree justification: In a system with two moving objects, when a collision occurs between the objects, the total kinetic energy is always conserved. the total kinetic energy and total momentum are always conserved. neither the kinetic energy nor the momentum is conserved. justification:

Explanation / Answer

1)A

2)Density = mass per unit volume =
[M]1[L]-3(i'm not able to see options clearly)

3)D

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