# Speeding Bullet

Pro Problems > Physics > Motion and Forces > Projectile Motion## Speeding Bullet

## Solution

In order to make it feasible for teachers to use these problems in their classwork, no solutions are publicly visible, so students cannot simply look up the answers. If you would like to view the solutions to these problems, you must have a Virtual Classroom subscription.## Similar Problems

### Roof Launch

A roof has a slope of 20 degrees, and a length of 20 meters. A box slides down the roof from the peak (assume a coefficient of kinetic friction of 0.15), until it reaches the edge of the roof. At this point, it falls 10 meters to the ground. How far from the building will the box land?

### You Sank My Battleship!

A cannon is placed at the edge of the deck of a battleship, nearest to the enemy’s warship. A projectile is fired toward the enemy, whose deck is at the same height as the first ship’s deck. The enemy ship is 500 feet away, and the ship is 50 feet wide. The muzzle velocity of the cannon is 400 ft/s. What range of angles can be used, and have the projectile hit the enemy battleship's deck?

### Leonard and William

BONUS: What can we conclude about the height at which the ping pong balls were fired?

* 16### Hunting on a Hill

### Slingshot Launch

A slingshot is two meters off the ground. The ammunition is in contact with the slingshot for 0.02 seconds during launch. The ammunition is fired horizontally, and lands 12 meters from the launch point. If the ammunition has a mass of 0.5 kg, what was the force applied to the ammunition during launch?

### Airplane Drop

### Horizontal Launch

A cannonball is fired from a cannon, at a height of 3 feet from the ground.

The cannonball travels 80 yards before hitting the ground. At what speed is the cannonball traveling when it hits the ground?

### Santa's Present Drop

Because of union troubles at the North Pole, Santa has to cut corners in his operation. One of the ways he's cutting corners this year is as follows: at every house, he will swoop down to 0.5 meter above the top of each chimney, and just as he's passing over the edge of the roof, he will drop presents from his sleigh, so they will fall down the chimney.

This will save him the time and trouble of climbing down chimneys (plus, Mrs. Claus likes it because he doesn't have as much cookies and milk this way).

However, there is a problem with the new system. Everyone's chimney must be the same distance from the edge of the roof. If Santa's sleigh travels at 40### Decelerating Jet

^{2}

Someone has marked an X on the ground 15000 meters ahead of the jet's current location.

If cargo is to be dropped in order to land exactly on the X, and we assume no air/wind resistance, how many seconds should they wait before dropping the cargo?

### Projectile with Air Resistance

A bullet is fired horizontally from a gun with an initial velocity of 600 ft/s. Wind resistance causes a horizontal acceleration of -2 ft/s^{2}. If the bullet is 4 feet off the ground when it is fired, how far will it travel before striking the ground?