Physics & Astronomy
Physics for Scientists and Engineers Study Set 1
Quiz 4: Newtons Laws
Which of the Following Free-Body Diagrams Represents the Car
Which of the following free-body diagrams represents the car going downhill without acceleration?
A) 1 B) 2 C) 3 D) 4 E) 5
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A net force is exerted toward the east on an object that is initially at rest. In which direction does the object start to move? A) north B) east C) west D) south E) It may start to move in any of these directions.
A horse-drawn coach is decelerating at 3.0 m/s
while moving in a straight line horizontally. A 350-g mass is hanging on a string 1.6 m long from the ceiling of the coach. The angle that the string makes with the vertical is A) 9.3º toward the front of the coach. B) 17º toward the front of the coach. C) 9.3º toward the back of the coach. D) 2.5º toward the front of the coach. E) 0º, or straight down.
A car is accelerating at a rate of 2.5 m/s
. A mass of 250 g is hanging from the ceiling on a string 1.2 m long. The angle that the string makes with the vertical is A) 14.3º toward the back of the car. B) 76º toward the back of the car. C) 7º toward the front of the car. D) 14.3º toward the front of the car. E) 0º, or straight down.
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