The answer to the first one is sublimation.
Airports use ramps to connect the plane to the airport and towing trucks use ramps to get the vehicles on the truck
A spinning force acting upon it
Answer:
Negative, because the speed is decreasing.
No, he did not perform any work. Work is when you’re using energy which results in a force. Even though he was tired and sweaty, he did not move the boulder. So therefore he did not perform any work.
