A boy throws a ball to another boy who throws it back with half the original...
A boy throws a ball to another boy who throws it back with half the original speed. What is the ratio of the final kinetic energy to the initial kinetic energy of the ball? ****The answer is 0.25, why and what formula is used?
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A boy throws a ball to another boy who throws it back with half
the original...
A girl slides down a snowy hill on an inflated tube sled where she collides with a boy who is stationary in another tube sled
A girl slides down a snowy hill on an inflated tube sled where she collides with a boy who is stationary in another tube sled. After the collision the girl moves off at an angle θ1 = 20 degrees from her original direction of motion and the boy moves off at an angle θ2 = 20 degrees, as shown in the figure, at half the girl's final speed. What is the ratio of the girl's mass to the boy's mass?
Constants PartA A boy 14.0 m above the ground in a tree throws a ball for...
Constants PartA A boy 14.0 m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the instant the ball is thrown. If the boy throws the ball upward at 65.0 above the horizontal, at 9.50 m/s. How fast must the dog run to catch the ball just as it reaches the ground? m/s Submit Request Answer Part B How far from the tree will the dog catch...
A boy throws a ball upward with a speed v0 = 12 m/s. The wind imparts...
A boy throws a ball upward with a speed v0 = 12 m/s. The wind imparts a horizontal acceleration of 0.4 m/s2 to the left. At what angle must the ball be thrown so that it returns to the point of release? Assume that the wind does not affect the vertical mm motion.
A 0.50 Kg ball with a speed of 12m hits a wvall and only 0.75 of...
A 0.50 Kg ball with a speed of 12m hits a wvall and only 0.75 of the original ball's collision with the ball? PROBLEM!2i speed. . How much kinetic energy is lost in the 8 Points a: What is the initial momentum of the ball and its direction? b What is the final momentum of the ball and its direction? C: What is the initial kinetic energy of the ball? d: How much kinetic energy has been lost in the...
After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a...
After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground, and is moving with a speed of 15 m/s when it reaches a maximum height of 15 m above the ground. What is the speed of the ball when it leaves Sarah's hand?How high above the ground will the ball be when it gets to Julie? (note, the ball may go over Julie's head.)
A ball with original momentum +4.0 kg m/s hits a wall and bounces straight back without...
A ball with original momentum +4.0 kg m/s hits a wall and bounces straight back without losing any kinetic energy. The change in momentum of the ball is?
In a game of pool, the cue ball strikes another ball of the same mass and...
In a game of pool, the cue ball strikes another ball of the same mass and initially at rest. After the collision, the cue ball moves at 3.70 m/s along a line making an angle of 24.0° with its original direction of motion, and the second ball has a speed of 1.70 m/s. (a) Find the angle between the direction of motion of the second ball and the original direction of motion of the cue ball. ° (b) Find the...
A softball pitcher throws a ball straight upward as hard as she can. According to your...
A softball pitcher throws a ball straight upward as hard as she can. According to your stopwatch, it takes exactly 4.20 seconds for the ball to (all back to the pitcher's hand Assuming no air drag: What was the speed at which the pitcher threw the ball upward? What is the maximum height reached by the ball? It taken 2.10 seconds to reach maximum height At half of that time. 1.05 seconds, how high is the ball? (Is it half-way...
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above...
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 23 m/s at an angle 28 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground. What is the horizontal component of the ball’s velocity right before Sarah catches it? What is the vertical component of the ball’s velocity right before Sarah catches it? What is the time the ball...
A bowler throws a bowling ball of radius R = 11 cm down a lane. The...
A bowler throws a bowling ball of radius R = 11 cm down
a lane. The ball slides on the lane with initial speed
vcom,0 = 11.0 m/s and initial angular speed
ω0 = 0. The coefficient of kinetic friction
between the ball and the lane is 0.22. The kinetic frictional force
fk acting on the ball causes a
linear acceleration of the ball while producing a torque that
causes an angular acceleration of the ball. When speed
vcom has...
Constants PartA A boy 14.0 m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the instant the ball is thrown. If the boy throws the ball upward at 65.0 above the horizontal, at 9.50 m/s. How fast must the dog run to catch the ball just as it reaches the ground? m/s Submit Request Answer Part B How far from the tree will the dog catch...
A boy throws a ball upward with a speed v0 = 12 m/s. The wind imparts a horizontal acceleration of 0.4 m/s2 to the left. At what angle must the ball be thrown so that it returns to the point of release? Assume that the wind does not affect the vertical mm motion.
A 0.50 Kg ball with a speed of 12m hits a wvall and only 0.75 of the original ball's collision with the ball? PROBLEM!2i speed. . How much kinetic energy is lost in the 8 Points a: What is the initial momentum of the ball and its direction? b What is the final momentum of the ball and its direction? C: What is the initial kinetic energy of the ball? d: How much kinetic energy has been lost in the...
A softball pitcher throws a ball straight upward as hard as she can. According to your stopwatch, it takes exactly 4.20 seconds for the ball to (all back to the pitcher's hand Assuming no air drag: What was the speed at which the pitcher threw the ball upward? What is the maximum height reached by the ball? It taken 2.10 seconds to reach maximum height At half of that time. 1.05 seconds, how high is the ball? (Is it half-way...
A bowler throws a bowling ball of radius R = 11 cm down
a lane. The ball slides on the lane with initial speed
vcom,0 = 11.0 m/s and initial angular speed
ω0 = 0. The coefficient of kinetic friction
between the ball and the lane is 0.22. The kinetic frictional force
fk acting on the ball causes a
linear acceleration of the ball while producing a torque that
causes an angular acceleration of the ball. When speed
vcom has...
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