# Problem 1: A coin is dropped from a hot air balloon that is 300 m above the

## Question:

**Problem 1:**

A coin is dropped from a hot air balloon that is 300 m above the ground and rising at 10 m/s upward. For the coin, find

- The maximum height reached.
- Its position and velocity 4 s after being released.
- The time before it hits the ground.

**Problem 2:**

Two cars start moving from the same point. One travels south at 70 m/hr, the other west at 55 m/ht. How far apart are they two hours later?

**Problem3:**

An instrument is thrown upward with a speed of 15m/s on the surface of a planet X where the acceleration due to gravity is 2.5 m/s² and there is no atmosphere. How long does it take for the instrument to return to where it was thrown?

**Problem 4:**

**Problem5: **

A girl throws a rock horizontally with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water?

**Problem 6:**

A stone is dropped from a tower 100 meters above the ground. The stone falls past ground level and into a well. It hits the water at the bottom of the well 5.00 seconds after being dropped from the tower. Calculate the depth of the well. Given: g=-9.81 m/ s²

**Problem 7:**

Lisa and Darrell both walk to their homes from the same school at the same speed. If Lisa walks for 14 minutes and Darrell walks for 21 minutes, how long would it take to walk from Lisa's place to Darrell's?

**Problem 8:**

A body starts from rest and accelerates uniformly at 5m/ s². Calculate the time taken by the body to cover a distance of 1km

**Problem 9:**

A stone projected horizontally from height of 45m with speed of 20m/s find time to reach the ground.

**Problem 10:**

An airplane requires 420 m of runway to take off from an airstrip. If the plane starts from the rest and it takes 32 s to lift off, with what velocity does it leave the ground? What was the average acceleration of the plane?

**Problem 11:**

Baseball of mass 60 g is dropped from the height of 2 m. What is the terminal velocity of the ball when it hits the ground?

**Problem 12:**

A car is traveling at 43.57 mph. The driver applies the brakes and the car decelerates at 2.15 m/s2. What is the stopping distance in meters?

**Problem 13:**

**Problem 14:**

A boat takes 2.9 hrs to travel 10 km down a river, then 6.3 hr to return.

Determine the speed of the water in the river.

**Related Book For**

## Applied Physics

ISBN: 978-0132109277

10th Edition

Authors: Dale ewen, Neill schurter, P. erik gundersen