A small mass m slides with negligible friction down an incline at an angle of 25

Question

A small mass m slides with negligible friction down an incline at an angle of 25.76 degree with respect to the horizontal. It then drops down to a horizontal surface and bounces elastically back up as shown. The picture is to scale. It shows the position of the mass at equal time intervals starting from rest at P. The height of the mass at S is the same as at Q. Click here to view the motion of the mass m. The speed of m at T is that at Q. The size of the total force on m at V is at R The speed change between X and U is between P and X. The size of the total force on m at X is at S The velocity of m at S is that at Q. The mechanical energy of m at V is that at S.

Explanation / Answer

1) 0 m/sec 2)mg 3)more than 4)less than 5) same as 6) same as : because tatal mechanical energy remain conserved. 4)

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