Since gravity pulls the object toward the earth with a constant acceleration g, the magnitude of velocity decreases as the ball approaches maximum height. Figure 1. Direction of velocity and acceleration for a ball thrown up in the air.

9.8 m/s/s

Near the surface of the Earth, the gravitational field is represented by the symbol g and has a value of about 9.8 newtons per kilogram. It is also true that a free falling (no air resistance) object falls with an acceleration of 9.8 m/s2—but it’s still just the gravitational field.

The acceleration of gravity near the earth is g = -9.81 m/s^2. To find out something’s speed (or velocity) after a certain amount of time, you just multiply the acceleration of gravity by the amount of time since it was let go of. So you get: velocity = -9.81 m/s^2 * time, or V = gt.

Free fall means that an object is falling freely with no forces acting upon it except gravity, a defined constant, g = -9.8 m/s2. The distance the object falls, or height, h, is 1/2 gravity x the square of the time falling.

In other words, if two objects are the same size but one is heavier, the heavier one has greater density than the lighter object. Therefore, when both objects are dropped from the same height and at the same time, the heavier object should hit the ground before the lighter one.

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.

They think that gravity acts more on a heavier object thus pulling it down faster. In fact, gravity works independently of mass. This means that all objects should fall at the same rate. If there is no air resistance, or the same amount of air resistance, then objects of the same mass will fall at the same rate.

To slow down a fall of an object, you will want to create more drag. That’s the goal of a parachute. Feathers make better parachutes than rocks.

Answer Expert Verified Newton’s inertia states that an object stays at rest unless acted upon an imbalanced force. Therefore, objects stay in place, because the forces acting on that object are balanced or the sum of the forces is equal to 0.

Speeding up While Falling Down When objects fall to the ground, gravity causes them to accelerate. In fact, its velocity increases by 9.8 m/s2, so by 1 second after an object starts falling, its velocity is 9.8 m/s. By 2 seconds after it starts falling, its velocity is 19.6 m/s (9.8 m/s + 9.8 m/s), and so on.

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

The acceleration of an object changes with altitude. The change in gravitational acceleration with distance from the centre of Earth follows an inverse-square law. This means that gravitational acceleration is inversely proportional to the square of the distance from the centre of Earth.

Increasing force tends to increase acceleration while increasing mass tends to decrease acceleration. Thus, the greater force on more massive objects is offset by the inverse influence of greater mass. Subsequently, all objects free fall at the same rate of acceleration, regardless of their mass.

When objects fall towards the Earth under the effect of gravitational force alone, then they are said to be in free fall. Acceleration of free fall is 9.8 m s−2, which is constant for all objects (irrespective of their masses).

The acceleration due to gravity is ALWAYS negative. Any object affected only by gravity (a projectile or an object in free fall) has an acceleration of -9.81 m/s2, regardless of the direction. The acceleration is negative when going down because it is moving in the negative direction, down.

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.

v2=u2+2as. These three kinematics equations can be used to study motion under uniform acceleration.

A newton is the SI unit of force. An unbalanced force of 1 N will accelerate a mass of 1 kg at 1 m/s2. One Newton of force is equal to one kilogram-meter per second per second (1kg-m/s2).

5.0m/s/s

Answer. Explanation: m=1000kg and a=3m/s2 . hence, the force needed to accelerate the 1000kg car by 3m/s2 is 3000N .

2m/s2.

m=10kg. Force applied on mass =20N. Here Assuming that surface is frictionless. Hence Acceleration a=Fm=2010=10ms2.