Free Fall

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, with no other forces acting on it.

Front

What is the acceleration due to gravity near the Earth's surface?

Back

The acceleration due to gravity near the Earth's surface is approximately 9.81 m/s².

Front

What happens to the speed of an object in free fall as it descends?

Back

The speed of an object in free fall increases as it descends, due to the constant acceleration of gravity.

Front

What is the formula to calculate the final velocity of an object in free fall?

Back

The formula is v = u + gt, where v is the final velocity, u is the initial velocity, g is the acceleration due to gravity, and t is the time.

Front

How does the initial velocity affect the motion of a ball projected upward?

Back

The initial velocity determines how high the ball will rise before it starts to fall back down.

Front

What is the significance of the point where the velocity of a ball is 0 m/s during its upward motion?

Back

This point is the maximum height of the ball, where it momentarily stops before descending.

Front

What is a dot diagram and how is it used in physics?

Back

A dot diagram is a visual representation of an object's position at equal time intervals, used to illustrate motion.

Front

At what point will a ball projected upward with an initial speed of 40 m/s be moving upward with a speed of 30 m/s?

Back

The ball will be moving upward with a speed of 30 m/s at a specific point in its trajectory, which can be determined using kinematic equations.

Front

What is the relationship between time and speed for an object in free fall?

Back

For an object in free fall, speed increases linearly with time, assuming no air resistance.

Front

What is the effect of air resistance on free-falling objects?

Back

Air resistance opposes the motion of falling objects, reducing their acceleration and terminal velocity.