1. A roller coaster car with a mass of 2.1 x 10²kg is at rest at the top of a 40. m hill above the ground. a) Determine the speed of the car at the bottom of the first hill which is at ground level. Assume that the first hill is frictionless. b) Determine the speed of the car if the mass 'm' is tripled. c) Determine the speed of the car at the top of the second hill, which is 20.m above the ground. Assume that the second hill is also frictionless.

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1. A roller coaster car with a mass of 2.1 x 10²kg is at rest at the top of a 40. m hill above the ground.
a) Determine the speed of the car at the bottom of the first hill which is at ground level. Assume that the
first hill is frictionless.
b) Determine the speed of the car if the mass 'm' is tripled.
c) Determine the speed of the car at the top of the second hill, which is 20.m above the ground. Assume
that the second hill is also frictionless.
24
sir
2751
SL
Transcribed Image Text:1. A roller coaster car with a mass of 2.1 x 10²kg is at rest at the top of a 40. m hill above the ground. a) Determine the speed of the car at the bottom of the first hill which is at ground level. Assume that the first hill is frictionless. b) Determine the speed of the car if the mass 'm' is tripled. c) Determine the speed of the car at the top of the second hill, which is 20.m above the ground. Assume that the second hill is also frictionless. 24 sir 2751 SL
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