**Asked by: Dr. Alexander Lueilwitz**

Score: 5/5 (73 votes)

Gravity always acts downward. Complete step by step solution: Once the body is thrown upwards, it goes up until **the velocity of the ball turns out to be zero and the force exerted on it becomes zero**. After that, the ball touches the ground with acceleration due to gravity and zero velocity.

## When a body is thrown up work done by gravity on the body is?

Since the angle between the force and displacement is 180 degrees, the work done by the gravitational force on the body is **negative**.

## When a body is moving upwards the force of gravity is acting?

Answer: When a body is moving upward , the force of gravity is **acting downward**.

## What is it when a body is thrown upward?

When a body is thrown vertically upwards, at the highest point only **velocity is zero** because the acceleration due to gravitational force is acting downward continuously and that is the reason for velocity being zero at the highest point, hence velocity is zero because of the acceleration.

## When a body is thrown up the acceleration due to gravity?

omg Assertion : When a body is thrown up, the acceleration due to gravity at the **topmost point is zero**. Reason : The acceleration due to gravity is always directed downwards towards the centre of the earth for a freely falling body.

**27 related questions found**

### What is the acceleration of a body thrown vertically upward?

If a body is thrown vertically upwards or downwards, the acceleration acting on the body is uniform i.e. **acceleration due to gravity = g**, in the downward direction.

### What is the acceleration produced in a body thrown vertically upward?

A vertical force causes a vertical acceleration - in this case, an acceleration of **9.8 m/s/s**.

### What is its acceleration when it reaches its maximum height?

(a) What are its velocity and acceleration when it reaches its maximum altitude? Key: At the maximum height, the ball is momentarily at rest. ... **The acceleration remains constant**, with magnitude equal to the free-fall acceleration and directed downward.

### How long does it take for the ball to reach its highest point?

It takes **about 88 seconds** for the cannonball to reach its maximum height (ignoring air resistance). You have 176 seconds, or 2 minutes and 56 seconds, until the cannonball destroys the cannon that fired it.

### When a body is thrown vertically upwards its final velocity?

When a body is thrown upward , due to acc. Due to gravity its speed decreases and after going till certain height its velocity becomes zero then it retraces its path back . so **final velocity is zero** .

### When a body is thrown up the force of gravity is zero?

Once the body is thrown upwards, it goes up **until the velocity of the ball turns out to be zero** and the force exerted on it becomes zero. After that, the ball touches the ground with acceleration due to gravity and zero velocity. When the ball goes up, the height of the ball rises and it also moves up.

### When a body moves vertically upward the work done will be?

The motion of the body and the direction of gravitational force will be in the opposite direction. So work done will be **negative**. As the body moves upward, it's velocity decreases hence the kinetic energy too.

### What is g in free fall?

the value of g is **9.8 meters per square second** on the surface of the earth. The gravitational acceleration g decreases with the square of the distance from the center of the earth. ... An object that moves because of the action of gravity alone is said to be free falling.

### When man is pushing a wall we can say no work is done?

Answers and Solutions

Question: Explain why no work is done when a man tries to push a wall? Answer: Even though the man exerts force on the wall , the **wall does not move**. Work done = force applied * displacement and since the displacement of the wall is zero. , work done is also zero.

### When a body is thrown up the force of gravity is positive or negative?

When a body is thrown up, the sign of g is **positive** when it goes up.

### When a ball is thrown up then the work done by the gravity is?

The work done by gravity is the negative of the change in the gravitational potential energy. Since the object returns to its original height, h_{2} - h_{1} = 0, and hence the work done is **zero**. No work is done.

### How long does it take something to hit the ground?

Measure the distance the object will fall in feet with a ruler or measuring tape. **Divide the falling distance by 16**. For example, if the object will fall 128 feet, divide 128 by 16 to get 8. Calculate the square root of the Step 2 result to find the time it takes the object to fall in seconds.

### What is the height reached by the ball after 1 second?

After 1 second, the height of the ball is **86 feet**.

### How long does it take the rock to reach half of its maximum height?

Answer: 180 m. (d) How long does it take the rock to reach half its maximum height? The highest point is 180, so the half of it is 90. 2 **≈ 25.61**.

### What it is acceleration just before it hits the ground?

what is the acceleration of a projectile thrown upward at it's highest point? A: ... So the acceleration of the projectile is equal to the acceleration due to gravity, **9.81 meters/second/second**, from just after its thrown, through its highest point, and until just before it hits the ground.

### How fast must a ball be thrown upward to reach a height of 12m?

The velocity with which a ball must be thrown vertically upwards so that it reaches a height of 12 m is **approximately 15.33 m/s**.

### What is its velocity 1's before it reaches its highest point?

At the top, its velocity is zero. (b) What is its velocity 1 s before it reaches its highest point? One second before reaching the top, it is moving up at **v = 10 m/s**.

### When a body is thrown vertically up then the motion is uniform True False?

A ball is thrown vertically upwards then it covers unequal distances in equal intervals of time. Hence,its motion is **non-uniform motion**.

### When a body is thrown vertically up then the motion is uniform is it correct?

A body thrown vertically upward moves **under constant retardation**. It is just the opposite case of the free fall.

### What happens when a ball is thrown vertically upward?

When you throw an object upwards, **it will eventually fall back to the ground under the earth's gravity**. ... An object that is thrown vertically upwards decelerates under the earth's gravity. Its speed decreases until it attains a maximum height, where the velocity is zero.