# Physics

posted by .

How fast must the ball rolled along the surface of a 70cm high table so that when it roll off the edge it will strike the floor at the same distance (70cm) from the point directly below the edge of the table.

• Physics -

h= g•t^2/2 => t =sqrt(2•h/g)= =sqrt(1.4/9,8)=0.38 s.
L =v(x) •t => v(x) = L/t =
=0.7/0.38 =1.85 m/s.

• Physics -

h= g•t^2/2 => t =sqrt(2•h/g)= =sqrt(1.4/9,8)=0.38 s.
L =v(x) •t => v(x) = L/t =
=0.7/0.38 =1.85 m/s.

## Similar Questions

1. ### Math/Physics

A ball rolls horizontally off the edge of a tabletop that is 1.60 m high. It strikes the floor at a point 1.58 m horizontally away from the table edge. (Neglect air resistance.)How long was the ball in the air?
2. ### physics

A ball rolls horizontally off the edge of a tabletop that is 1.0m high. It strikes the floor at a point 1.5m horizontally away from the edge of the table. Find the speed when the ball left the table. Find the time it takes to fall …
3. ### Physics

A small ball rolls horizontally off the edge of a table that is 1.20 m high. It strikes the floor at a point 1.52 m horizontally from the table edge. How long is the ball in the air?
4. ### physics

A ball with mass m rolls over the edge of a table h meters above the ground. It lands a distance x meters from a point directly below the edge of the table. Show that the speed of the ball at the edge of the table was v=x/sq rt 2h/g …
5. ### Physics

A ball rolls off a tabletop 0.900 m above the floor and lands on the floor 2.60 m away from a point that is directly under the edge of the table. At what speed did the ball roll off of the table?
6. ### physics

A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below?
7. ### PHYSICS Urgent help please

A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below?
8. ### Physics

A small ball rolls horizontally off the edge of a tabletop of height h. It strikes the floor a distance x horizontally away from the edge of the table. (Use any variable or symbol stated above along with the following as necessary: …
9. ### physics

How fast must a ball be rolled along a 100 cm high table so that when it rolls off the edge it will strike the floor at a distance of 100 cm from the point directly below the table edge?
10. ### Science

a ball is rolled off the edge of a dining table 1.5 m high with a horizontal velocity of 2.2 m/s with what velocity does it strike the ground?

More Similar Questions