Two children are playing tetherball, in which a ball at the end of a cord spins around a pole. After a really good hit, the ball makes three complete revolutions in 2.0 s.What is the angular speed of the ball?
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Two children are playing tetherball, in which a ball at the end of a cord spins...
a) Tetherball is a game that uses a ball hanging from a string attached to the top of a post, where the ball is sent flying around in the tangential direction. Assume a uniform gravitational acceleration g pointed downward. This is an example of what is known as a “conical pendulum.” i) Find the equilibrium angle that the string makes with the vertical for a given speed v such that the ball traces a circle at uniform height. ii) Estimate...
Children playing in a playground on the flat roof of a city school lose their ball to the parking lot below. One of the teachers kicks the ball back up to the children. The playground is 5.80 m above the parking lot, and the school building's vertical wall is ℎ = 7.20 m high, forming a 1.40 m high railing around the playground. The ball is launched at an angle of ? = 53.0° above the horizontal at a point...
Children playing in a playground on the flat roof of a city school lose their ball to the parking lot below. One of the teachers kicks the ball back up to the children as shown in the figure below. The playground is 5.10 m above the parking lot, and the school building's vertical wall is h-6.50 m high, forming a 1.40 m high railing around the playground. The ball is launched at an angle of = 53.0° above the horizontal...
Two friends are playing golf. The first friend hits a golf ball on level ground with an initial speed of 36.5 m/s at an angle of 31.0° above the horizontal. (a) Assuming that the a ands at the same height from which it was hit, how far away from the golfer, in meters, does it land? Ignore air resistance. What constant acceleration equations will allow you to find the range, given the speed and angle? (Note that, depending on your...
...36 GO Two children are playing a game in which they try to hit a small box on the floor with a marble fired from a spring-loaded gun that is mounted on a table. The target box is hori- zontal distance D = 2.20 m Figure 8-48 Problem 36. from the edge of the table; see Fig. 8-48. Bobby compresses the spring 1.10 cm, but the center of the marble falls 27.0 cm short of the center of the box....
A ball with a weight of 2 N is attached to the end of a cord of length 2 m. The ball is whirled in a vertical circle counterclockwise. The tension in the cord at the top of the circle is 7 N and at the bottom it is 15 N. (Do not assume that the speed of the ball is the same at these points.) a) Three students discuss the net forces on the ball at the top: Deante:...
A cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the planeas shown in the figure. Determine the speed of the block after it has traveled 1.60 m along the plane, starting from rest for the following circumstances.http://i.imgur.com/crj4u.gifa) Assume there is no friction.(b) Assume the coefficient of friction between all surfaces is µ = 0.050
Jeanette is playing in a 9-ball pool tournament. She will win if she sinks the 9-ball from the final rack, so she needs to line up her shot precisely. Both the cue ball and the 9-ball have mass m and the cue ball is hit at an initial speed of v1 Jeanette carefully hits the cue ball into the 9-ball off center, so that when the balls collide, they move away from each other at the same angle theta from...
Two children are playing a game where they run towards each other and see who can reach a toy that is somewhere between them. In the beginning, Charlie is 23.7 m away from the toy, running towards it at a speed of 0.770 m/s, and is speeding up. At the same time, Amy is 12.5 m away from the toy, is running towards it in the opposite direction as Charlie at a speed of 2.70 m/s, and is slowing down....
The figure shows an elaborate setup of a blue cord wrapped around six pulleys supporting three weights (two of which have identified weight in N, one of which is not given). The pulleys are supported by the red cables from the ceiling which are labeled with numbers 1-4. The blue cord is attached to the ceiling at its right end, but attached to one of the pulleys at its left end. The weights are suspended from the pulleys using pink...