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 s to scale. It shows the position or the mass at equal time intervals starting from rest at X. The height of the mass at Q s the same as at T. Click here to view the motion of the mass m. . The mechanical energy of m at R is less than that at T. . The velocity of m at T is equal to that at Q. . The speed change between X and U is greater than between U and S. . The speed of m at Q is greater than that at P. . The size of the total force on m at U is greater than at T. . The size of the total force on m at V is less than at R. The mass is in contact with the ground for a very brief time. Elastically implies that no energy is lost.

Explanation / Answer

- the same

- is equal

- is equal

- is greater

- is less than

- is less

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