The figure provided shows a car that has run out of gas while driving down a hil
ID: 1459698 • Letter: T
Question
The figure provided shows a car that has run out of gas while driving down a hill and various free-body diagrams. If the car is at the bottom of the valley, which free-body diagram best corresponds to the situation if drag and rolling friction are negligible? e b f a d c
The figure provided shows two balls attached to a string moving in vertical circles. If both balls are of equal mass and speed, the tension in case A is ...
... equal to the tension in case B.
... greater than the tension in case B.
... less than the tension in case B.
A golfer starts with the club over her head and swings it to reach maximum speed as it contacts the ball. Halfway through her swing, when the golf club is parallel to the ground, the acceleration vector of the golf club head points
Toward the golfer's shoes.
Toward a point above the golfer's head.
Parallel to the ground.
Straight down.
please help thanks
Explanation / Answer
When the rolling and drag forces are negligible, then the free body diagrams including horizontals forces (i.e. ) d, e and f are not correct.At the bottom of the valley, the car is going to be accelerated in positive y axis. Due to this reason, figure (a) is correct free body diagram when the car is at the bottom of the valley.
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