HOW DOES THE DISTANCE BETWEEN EARTH AND THE SUN COMPARE TO THE DISTANCES BETWEEN EARTH AND NEARBY STARS AND GALAXIES?
You see an advertisement for a new free fall ride at an amusement park. The ad says the ride is 50 meters tall and reaches a speed of 28m/sec at the bottom. How efficient is the ride? Hint: You can use any mass you wish because it cancels out.
An 800kg roller coaster starts from top of a 45m hill with a velocity of 4m/s. The car travels to the bottom, through a loop, and continues up the next hill. The end of the roller coaster has a level surface that is 4m off the ground. Assume there is no friction on the roller coaster ridea and energy is concerved. Q. How tall is the hill if the roller coaster is traveling at 10m/s at the top of it? Q. What will be the velocity of the roller coaster at the top of the loop?
A 4.0-kilogram ball moving at 8.0 m/s to the right collides with a 1.0-kilogram ball at rest. After the collision, the 4.0-kilogram ball moves at 4.8 m/s to the right. What is the velocity of the 1-kilogram ball?
If I push on a wall with a force of 3500 N for 5 hours but the wall does not move, how much work have I done.
a 60kg rock in on a mountain in banff national park breaks free from a ledge and falls down 500 meters to the bottom of the mountain the average air resistance is 150N what is the average acceleration of the rock?
