Question

You have a mass at the top of a frictionless 85 cm ramp that has been...

You have a mass at the top of a frictionless 85 cm ramp that has been raised to an angle of 30° above the horizontal. Do the following and be sure to show your work: a. Find the speed of the mass when it reaches the bottom of the ramp if it starts from rest. (Hint: this can be done with either the kinematics equations or conservation of energy.) b. Once the mass reaches the bottom of the ramp, it slides horizontally off the edge of a table. Find the time it takes for the mass to reach the ground 1.2 m below, measured from the moment it leaves the table. (Hint: this can be done with the kinematics equations.)

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Answer #1


Use energy conservation principle and equation of kinematics for vertical motion for the second part where downward direction is taken as positive to find the required speed and time as shown below.

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