What is the speed of the ball after 3 seconds?

After 3 seconds, the velocity is 4.5+3×1.5=9 m/s.

What happens to the velocity of a ball dropped from the top of a building?

If you drop a ball from the top of a building it gains speed as it falls. Every second, its speed increases by 10 m/s. A ball falling under the influence of gravity is an example of what we call motion with constant acceleration.

What is the height of a building if a stone dropped from the roof takes 10s to reach the ground G 9.8 m s2?

Answer Expert Verified. Hence, the height of the tower is 490 m.

What is the velocity of a ball being dropped?

The speed of the falling ball as a function of time is v = 9.8 (m/s2) t and the distance traveled is d = ½ 9.8 (m/s2) t2. In one second the ball travels 4.9 m. The velocity of the falling ball as a function of time is v = -9.8 (m/s2) t j and its position as a function of time is r = (4.9 m – ½ 9.8 (m/s2) t2) j.

How far did the ball go at 2 seconds?

Both balls will take 2 seconds to hit the ground. The red ball is traveling at 35 m/s at the release. It travels in the air for 2 seconds. Using the equation, d = vt for linear motion, The distance traveled in air is 35 m/s x 2 seconds = 70 meters.

What is the velocity of the ball when it strikes the ground?

Conclusion: The magnitude of the velocity of the ball is 26.3 m/s for the parabolic motion just before it hits the ground and this greater than the 17.1 m/s for the velocity of the ball that falls straight downward.

What is the height of a building?

The building height is the vertical distance between finished grade and the highest point on the building, provided that the measured elevation does not include fill or berms. However, on sloped sites the building height is measured from the average finished grade to the highest point on the building.

What is meant by free fall a ball is dropped from the roof?

When an object falls from any height under the influence of gravitational force only, it is known as free fall. In the case of free fall no change of direction takes place but the magnitude of velocity changes because of acceleration. This acceleration acts because of the force of gravitation and is denoted by ‘g’.

When a ball is let free fall from the top of building?

When we allow a ball to fall freely from the building, the acceleration is g = 9.8 m / s 2 . And the sign of acceleration is because the velocity of the ball increases.