A child of mass 30 kg skates down from the top of a ramp having a constant slope 15° the child speed increases from 1.5m/s to3.0m/s as she reaches the bottom of ramp a force of kinetic friction magnitude 50 nuton opposes her motion determine the length of ramp (g=10)
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Given that a child of mass 30 kg skates down from the top of a ramp having a constant slope 15°, the child speed increases from 1.5m/s to3.0m/s as she reaches the bottom of ramp a force of kinetic friction magnitude 50N opposes her motion. The length of ramp is 1.09m.
1. Let the length of ramp be l meters and the height from ground be h meters.
2. By law of conservation of energy, the total potential energy at the top of the ramp is equal to the total average kinetic energy at the bottom of the ramp.
3. Thus subsequently the length of the ramp is calculated as shown below to be 1.09m.
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