Final answer:
When parking downhill, turn your wheels towards the curb or side of the road to create an extra barrier that helps prevent the vehicle from rolling down the hill.
Step-by-step explanation:
The correct answer is option Physics. When parking downhill, it is important to turn your wheels towards the curb or side of the road. This is called curb-side parking or downhill parking.
By turning your wheels towards the curb, you create an extra barrier that helps prevent the vehicle from rolling down the hill in case the parking brake fails.
This is because the tires will hit the curb and act as a physical stopper, reducing the risk of the vehicle rolling away.
The correct answer is option 'True' to the question stating whether a cyclist coasts down one hill and up another hill until she comes to a stop at a point lower than when she started, because part of the potential energy is converted to heat, warming up the bicycle tires.
This scenario is an example of the conservation of energy in physics, where the cyclist's potential energy at the top of the first hill is converted to kinetic energy as she coasts downwards.
Some of this kinetic energy is then converted back to potential energy as she climbs the next hill, but not all, because friction between the tires and the road converts some kinetic energy into heat, thus the cyclist does not reach the same height and stops at a lower point.
This is because the energy lost as heat cannot be recovered, resulting in a lower total potential energy at the stop point.