Observer A stands at the top of the cliff and throws a ball straight upwards with...
Observer A stands at the top of the cliff and throws a ball straight upwards with a speed of 30 m/s. Observer B is flying in a helicopter that is going straight upward with a speed of 30 m/s. At the moment that observer B passes observer A, B releases a ball. B simply lets go of the ball and does not throw it. (Assume that air resistance has a negligible effect on the balls.)
Be sure to include direction when asked for velocity or acceleration.
Now suppose that B’s helicopter is accelerating upward at 9.81 m/s2.
- What does B say the acceleration of the ball he dropped is?
- What does A say the acceleration of the ball B dropped is?
- What does B say the acceleration of the ball A threw is?
Homework Answers
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Observer A stands at the top of the cliff and throws a ball
straight upwards with...
Observer A stands at the top of the cliff and throws a ball straight upwards with...
Observer A stands at the top of the cliff and throws a ball straight upwards with a speed of 30 m/s. Observer B is flying in a helicopter that is going straight upward with a speed of 30 m/s. At the moment that observer B passes observer A, B releases a ball. B simply lets go of the ball and does not throw it. (Assume that air resistance has a negligible effect on the balls.) Be sure to include direction...
A lady stands at the edge of a 50 m cliff and throws a ball straight...
A lady stands at the edge of a 50 m cliff and throws a ball straight up with an initial velocity of 15 m/s. The ball goes up, then falls back down all the way to the ground at the base of the cliff. How long is it in the air? (treat this as a 1-D problem) a.7.82s b.3.91s c.5.07s d.1.74s
A helicopter is slowly accelerating straight upwards at a rate of 1.6 m/s². If the helicopter...
A helicopter is slowly accelerating straight upwards at a rate of 1.6 m/s². If the helicopter blades have to generate an upward force of 8400 N in order to cause this, then what must be the mass of the helicopter? (Take the acceleration of gravity g = 9.81 ) 92 * kg Now suppose the helicopter pilot reaches his desired speed, and no longer wants to accelerate (just maintain his upward velocity). How much force will the blades have to...
O student stands at the edge of a cliff and throws a stone horizontally over the...
O student stands at the edge of a cliff and throws a stone horizontally over the edg with a speed of 18.0 m/s. The cliff is 50.0 m above a flat, horizontal beach as shown in the figure below. How far from the base of the cliff (x) does the ball hit the beach? (Neglect air resistance) 18 m/s h 50 m to A) 57.5 m B) 184 m C) 5.64 m D) 2.77 m E) 3.19 nm
Q) Ball A is thrown straight up with an initial velocity V0 from a cliff of...
Q) Ball A is thrown straight up with an initial velocity V0 from a cliff of height h above ground, where h is not known. at the same time ball B is dropped from the same cliff. the time of flight of ball B is 1/4 that of ball A. take the upward direction is positive and A) draw a single V vs. t plot for both balls. B) draw a single position vs. time plot for both the balls....
A student at the top of a building throws a red ball upward with speed v0...
A student at the top of a building throws a red ball upward with speed v0 and then throws a blue ball downward with the same initial speed v0. Immediately before the two balls reach the ground, which of the following statements are true? (Select all that apply.) A. The acceleration of the blue ball is greater than that of the red ball. B. The speed of each ball is greater than v0. C. The speed of the red ball...
A man stands at the edge of a cliff and throws a rock horizontally over the...
A man stands at the edge of a cliff and throws a rock
horizontally over the edge with a speed of
v0 = 15.5 m/s.
The rock leaves his hand at a height of
h = 46.0 m
above level ground at the bottom of the cliff, as shown in the
figure. Note the coordinate system in the figure, where the origin
is at the bottom of the cliff, directly below where the rock leaves
the hand
m
How long...
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...
A student stands at the edge of a cliff and throws a stone horizontally over the...
A student stands at the edge of a cliff and throws a stone horizontally over the edge with V-18.5 m/s. The cliff is h = 48.3 m above a body of water as shown in the figure below. (a) What are the coordinates of the initial position of the stone? (Note that the origin is at the base of the cliff, where the x- and y-axes intersect.) X;= (b) What are the components of the initial velocity of the stone?...
A ball is dropped from the top of a cliff. the height of the cliff is...
A ball is dropped from the top of a cliff. the height of the cliff is 1000m. a) how long does for the ball to hit the ground if the cliff is on earth (g= 9.80 m/s^2)? b) how long does it take if its on the moon (g= 1.60 m/s^2)?
A helicopter is slowly accelerating straight upwards at a rate of 1.6 m/s². If the helicopter blades have to generate an upward force of 8400 N in order to cause this, then what must be the mass of the helicopter? (Take the acceleration of gravity g = 9.81 ) 92 * kg Now suppose the helicopter pilot reaches his desired speed, and no longer wants to accelerate (just maintain his upward velocity). How much force will the blades have to...
O student stands at the edge of a cliff and throws a stone horizontally over the edg with a speed of 18.0 m/s. The cliff is 50.0 m above a flat, horizontal beach as shown in the figure below. How far from the base of the cliff (x) does the ball hit the beach? (Neglect air resistance) 18 m/s h 50 m to A) 57.5 m B) 184 m C) 5.64 m D) 2.77 m E) 3.19 nm
A man stands at the edge of a cliff and throws a rock
horizontally over the edge with a speed of
v0 = 15.5 m/s.
The rock leaves his hand at a height of
h = 46.0 m
above level ground at the bottom of the cliff, as shown in the
figure. Note the coordinate system in the figure, where the origin
is at the bottom of the cliff, directly below where the rock leaves
the hand
m
How long...
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 student stands at the edge of a cliff and throws a stone horizontally over the edge with V-18.5 m/s. The cliff is h = 48.3 m above a body of water as shown in the figure below. (a) What are the coordinates of the initial position of the stone? (Note that the origin is at the base of the cliff, where the x- and y-axes intersect.) X;= (b) What are the components of the initial velocity of the stone?...
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