Q: What is an initial speed of a cannonball?

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Its initial speed cannot be 20 m, as stated in the question. Secondly, if the initial speed is correctly given, then there is no need to calculate it!

Yes.

The speed will depend on its initial velocity and any forces acting on it.

they would be in a vacuum

If you know the initial speed (u), acceleration (a) and time (t), then the final speed, v = u + at.

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the speed it moved at was very close to a cannonballs speed after leaving a cannon

The range of a projectile is given by R=(v2/g)Sin(2Theta) so for an angle of 30 and an initial speed of 100 m/s: R=(1002/9.8)Sin(60)=(10000/9.8)(sqr3/2)= 883.7 m ^^know-it-all! :@ ^^^^^^^^^;)

A cannonball is fired by a cannon due to the buildup of pressure behind it when ignited. The explosion of gunpowder causes the cannonball to be propelled out of the cannon at high speed. The trajectory and distance the cannonball travels is influenced by factors such as the angle of the cannon and the amount of gunpowder used.

initial speed means first

To calculate initial speed (also known as initial velocity), use the following formula: initial speed = (final speed - acceleration*time). You will need to know the final speed, acceleration, and time to calculate the initial speed accurately.

Initial speed is the original, beginning speed of an object.

The kinetic energy of the cannonball can be calculated using the formula: KE = 0.5 * m * v^2, where m is the mass of the cannonball (50 kg) and v is the speed of the cannonball (80 m/s). Plugging in the values, KE = 0.5 * 50 kg * (80 m/s)^2 = 160,000 Joules. Therefore, the kinetic energy of the cannonball at a speed of 80 m/s will be 160,000 Joules.

A cannonball can travel at speeds ranging from 400 to 1,800 feet per second, depending on the type of cannon and the amount of gunpowder used. The actual speed will also depend on factors such as the weight and size of the cannonball.

The energy needed to move a cannonball is created by burning fuel--usually gunpowder but nothing says they couldn't make a cannon that burned propane to fire projectiles. Anyway, if you're firing a round the speed of that cannonball is determined in part by how long the energy's being applied to it. The longer the barrel is, the longer the energy will be applied and the faster the cannonball will go.

The speed of a cannonball would vary based on factors such as the type of cannon, the amount of gunpowder used, and the angle of elevation. Generally, a cannonball could travel at speeds between 500-1500 feet per second.

No, the initial speed of an object can be any value depending on the situation. An object can have an initial speed that is greater than zero.

If a car is speeding up, its initial speed is less than its final speed. As the car accelerates, its speed increases over time, so the initial speed is lower than the final speed attained during acceleration.