1) A motorist travels on ramp of radius 65 m with a speed of 25m/s. The combined
ID: 2233676 • Letter: 1
Question
1) A motorist travels on ramp of radius 65 m with a speed of 25m/s. The combined mass of the car and motorist is 2650 kg. a) what is the motorist;s acceleration? b) what is the force acting on them? 2) what acceleration is produced by a 150 N force acting on a mass of 20 kg if the mass starts from rest and accelerating to 20 m/s? 3)A 6 feet six inches skinny guy wearing a very tight fitting blue jeans and a very expensive leather boots applies a 220 N horizontal force to push a brown wooden crate containing some oranges, some pears, some bananas, and other fruits to the park to have a picnic with a friend. If the mass of the crate and its contents is 1500 kg, what is the acceleration of the crate?Explanation / Answer
1a) The acceleration is centripetal, soapply a = v^2/r
a = (25)^2/65
a = 9.62 m/s^2
1b) F = ma (centripetal force and centripetal acceleration)
F = (2650)(9.62) = 25481 N
2) Apply F = ma
150 = 20(a)
a = 7.5 m/s^2
3) Apply F = ma
220 = (1500)(a)
a = .147 m/s^2
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