how long will it take the ball to reach the ground related questions

- 1a girl throws a ball vertically upwards at 5m/s from the roof of a building 20m high
how long will it take the ball to reach the ground
a girl throws a ball vertically upwards at 5m/s from the roof of a building 20m high how long will it take the ball to reach the ground? and what will its speed be when it strikes the ground

- 2
A girl throws a ball vertically upwards with speed 8ms-1 from a window which is 6m above horizontal ground
I could do 4a. But not 4b, its hard! :o Question 4. A girl throws a ball vertically upwards with speed 8ms-1 from a window which is 6m above horizontal ground. (a) find the greatest height above the ground reached by the ball. - completed, i got 9.3 metres which was correct. 1.5 seconds later she drops a second ball from rest out of the same window. (b) Find the distance below the window of the point where the balls meet. I cant do (b) can any one help? Thanks alot in advance! :D

- 3A ball is thrown straight up from the ground
with an initial velocity of 30.4 m/s; at the
same instant, a ball is dropped from the roof
of a building 21.1 m high
A ball is thrown straight up from the ground with an initial velocity of 30.4 m/s; at the same instant, a ball is dropped from the roof of a building 21.1 m high. After how long will the balls be at the same height? The acceleration of gravity is 10 m/s2. Answer in units of s

- 4a bouncing ball of mass 200g leaves the ground with a kinetic energy of 10J
a)if the ball rises vertically, calculate the maximum height it is likely to reach
a bouncing ball of mass 200g leaves the ground with a kinetic energy of 10J a)if the ball rises vertically, calculate the maximum height it is likely to reach. b)in practice, the ball rarely reaches the maximum height. explain why this is so.

- 5If a ball is thrown vertically upward from the roof of a 32 foot tall building with a velocity of 64 ft/sec, its height in feet after T seconds is: s(T)= 32+64T-16T^2
What is the maximum height the ball reaches
If a ball is thrown vertically upward from the roof of a 32 foot tall building with a velocity of 64 ft/sec, its height in feet after T seconds is: s(T)= 32+64T-16T^2 What is the maximum height the ball reaches? What is the velocity of the ball when it hits the ground (height )?

- 6John Stands at the edge of a flat roof of a three story building and throws a 180g ball straight up into the air that reaches a height of 3.0 meters above the roof
John Stands at the edge of a flat roof of a three story building and throws a 180g ball straight up into the air that reaches a height of 3.0 meters above the roof. ( building is 14 meters high) A. What is the initial speed of the ball? B. How long does it take to reach it's maximum height? C. Assuming it misses the building on it's way down, at what speed does it hit the ground? ( building is 14 meters high) D. What is the total length of the time the ball is in the air? E. What is the intitial momentum of the ball? F. What is the momentum of the ball at its peak? G. What is the momentum of the ball when it hits the ground? Thank you!

- 7With what minimum speed must you toss a 130 g ball straight up to hit the 12 m-high roof of the gymnasium if you release the ball 1.3 m above the ground
With what minimum speed must you toss a 130 g ball straight up to hit the 12 m-high roof of the gymnasium if you release the ball 1.3 m above the ground? I already figured out the minimum speed, 14m/s I'm confused on the next part With what speed does the ball hit the ground? Do I use, for values of H, 10.7m or 12m or 13.3m?

- 8With what minimum speed must you toss a 160 ball straight up to hit the 15 -high roof of the gymnasium if you release the ball 1.7 above the ground
With what minimum speed must you toss a 160 ball straight up to hit the 15 -high roof of the gymnasium if you release the ball 1.7 above the ground? Solve this problem using energy.

- 9A ball dropped from the roof of a building take 4s to reach the street
A ball dropped from the roof of a building take 4s to reach the street. How high is the building?

- 10
If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground
1. If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground? Remember, the formula for distance is d = 16t^2. (1 point) 1 3.2 10.5 16 2. The volume of a box can be found by multiplying the length times width times height of a box (V = lwh). If the volume of a box is 1,300 cubic inches and all its dimensions are equal, what is the side length of the box in inches? (1 point) 10.9 36.1 162.5 433.3 3. The area of a circle is found with the formula A = 3.14r^2 where pi represents 3.14. If a tile artist is laying down tiles in a circular mosaic pattern and the area of the circle is 706.5 square feet, what is the radius of the circle in feet? (1 point) 11 13 15 17 4. Daisy is shipping a package to her daughter, Molly. If the box’s dimensions are equal and the length is 3 feet long, what is the volume of the box in cubic feet? (1 point) 1 3 9 27 1. 10.5 2. 10.9 3. 15 4. 27

- 11If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground
If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground? Remember, the formula for distance is d = 16t^2. 1 3.2 10.5 16

- 12A ball is thrown upward from the ground with an initial speed of 26.7 m/s; at the same instant, a ball is dropped from a building 13.1 m high
A ball is thrown upward from the ground with an initial speed of 26.7 m/s; at the same instant, a ball is dropped from a building 13.1 m high. After how long will the balls be at the same height?