# Physic

posted by .

A ball is thrown upward. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s^2 and maximum height is 7.2 m,. Neglect air resistance. Answer in units of m/s

• Physic -

h = vt - 4.9t^2
max height reached at t=v/9.8 sec
7.2 = v(v/9.8) - 4.9(v/9.8)^2
v = 11.9m/s

## Similar Questions

1. ### physics

A ball is thrown upward. After reaching a maximum height, it continues falling back to- ward Earth. On the way down, the ball is caught at the same height at which it was thrown upward.If the time (up and down) the ball remains in …
2. ### physics

A ball is thrown upward.What is its maximum height?
3. ### physics

a ball is thrown upward what is its maximun height?
4. ### Physics

What is its initial vertical speed? The acceleration of gravity is 9.8 m/s 2 and maximum height is 4.7 m ,. Neglect air resistance. Answer in units of m/s
5. ### Physics

A ball is thrown straight upward and returns to the throwerâ€™s hand after 2.3 s in the air. A second ball is thrown at an angle of 60◦ with the horizontal. At what speed must the second ball be thrown so that it reaches the …
6. ### PHYISCS

A ball is thrown upwards. What is its initial vertical speed?
7. ### physics

A ball is thrown upward. What is its time interval between the release of he ball and the time it reaches its maximum height?
8. ### calculus

Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.) A ball is thrown vertically upward from a height of 4 feet with an initial velocity of 79 feet per second. How high will the ball go?
9. ### calculus

Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.) A ball is thrown vertically upward from a height of 4 feet with an initial velocity of 79 feet per second. How high will the ball go?
10. ### calculus

Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.) A ball is thrown vertically upward from a height of 4 feet with an initial velocity of 79 feet per second. How high will the ball go?

More Similar Questions