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Acceleration = (change in velocity) / (time for the change)

9.8 = (change in velocity) / (2 seconds)

9.8 x 2 = change in velocity = 19.6 meters per second .

Hint: The mass of the object and the height of the building are there just to

throw you off balance. You don't need either of them to answer the question.

Q: What would be the change in velocity for a 10 gram object dropped from the roof of a 20 meter building if it takes 2 seconds to reach the ground Hint acceleration due to gravity is 9.8 ms²?

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Going back to definitions, Velocity is change of distance with time; and acceleration is change in velocity with time. Initially, the velocity is zero, as is the acceleration, BUT the Force of Gravity attracts the falling mass, and causes velocity to appear. But the continued application of the Force of Gravity causes the velocity to increase. And as we know, increase in velocity is acceleration. [space for QED]

In two seconds of fall, the speed increases 19.6 meters (64.4 feet) per second. The magnitude of velocity increases by that amount, while the direction of velocity doesn't change.

the final velocity assuming that the mass is falling and that air resistance can be ignored but it is acceleration not mass that is important (can be gravity) final velocity is = ( (starting velocity)2 x 2 x acceleration x height )0.5

vf=vi+at² simplifying making vi=0, v=at²t²=v/at=√v/atime equals square root of velocity divided by acceleration (or gravity)

Power is equal to Force times velocity; P=Fv. You are given the 'speed', which I assume to be velocity. You also have acceleration. In order to find F, you need first to find the mass, which you can calculate from the weight, Fg, by dividing by the acceleration due to gravity, 9.8. You then have the mass. From here, multiply mass times acceleration times the velocity.

Related questions

When a ball is dropped, it starts with an initial velocity of zero. However, as it falls towards the ground, it accelerates due to gravity, causing its velocity to increase. Therefore, the velocity of the ball is non-zero as it falls towards the ground.

No, the shot bullet will land after the dropped bullet. This is because the shot bullet has an initial horizontal velocity in addition to the vertical acceleration due to gravity, while the dropped bullet only has the vertical acceleration due to gravity.

No, the acceleration is not the same for an object that is dropped and an object that is thrown. When an object is dropped, it experiences a constant acceleration due to gravity. When an object is thrown, its acceleration can vary depending on factors such as the initial velocity and direction.

In the case of a parachute, the person and parachute fall at a constant speed once the forces acting on them are balanced. This means that the net acceleration, including gravity, is zero. Gravity is still acting on the person and parachute, but it is balanced by the drag force exerted by the parachute, resulting in a constant speed descent.

The final velocity of the ball when it hits the ground can be calculated using the equation: final velocity = initial velocity + (acceleration due to gravity * time). Assuming the ball was dropped from rest, the initial velocity would be 0 m/s. With the acceleration due to gravity being approximately 9.8 m/s^2, the final velocity would be 32.34 m/s.

Both balls would have the same acceleration due to gravity, regardless of the height from which they were dropped. This is because the acceleration due to gravity is constant and does not depend on the initial position of the objects.

Yes, uniform negative acceleration (specifically gravity) can accurately describe the motion of a heavy object thrown downward from a tall building. The object would experience a constant acceleration due to gravity as it falls towards the ground. This acceleration would cause the object's velocity to increase over time until it reaches the ground.

Going back to definitions, Velocity is change of distance with time; and acceleration is change in velocity with time. Initially, the velocity is zero, as is the acceleration, BUT the Force of Gravity attracts the falling mass, and causes velocity to appear. But the continued application of the Force of Gravity causes the velocity to increase. And as we know, increase in velocity is acceleration. [space for QED]

Acceleration due to gravity is the force that pulls objects towards the Earth. It causes objects to accelerate at a rate of 9.81 m/s^2 towards the ground. This acceleration is responsible for the feeling of weight that we experience, and it also affects the trajectory of objects thrown or dropped.

Gravity changes velocity because it accelerates objects towards the Earth at a rate of 9.81 m/s^2. As objects fall, their velocity increases due to this gravitational acceleration. Conversely, when objects move against gravity, such as when thrown upwards, gravity decreases their velocity until they eventually stop and fall back down.

Acceleration due to gravity is the rate at which an object speeds up while falling towards the Earth. This acceleration is approximately 9.81 m/s^2 near the Earth's surface. Gravity causes objects to accelerate towards the center of the Earth, leading to phenomena like free fall and weightlessness.

The velocity of the ball can be calculated using the formula v = at, where v is the velocity, a is the acceleration of gravity (3.7 m/s^2 on Mars), and t is the time the ball has been falling. Without knowing the time, we cannot determine the exact velocity of the ball.