Work
Ben wants to ascend to height \(h\). He has two choices:
He can either climb a ladder or he can walk up a slope.
In which case would Ben do more work against gravity?
When an airplane lands on a runway, its speed decreases very quickly and it soon comes to a halt. What is the sign of work done by all the forces acting on the plane when it lands?
Frank tied a string to his toy car and wants to pull it along with him as he walks along his room. He can pull the toy car with a force of \(\SI{5}{\newton}\)
At what angle should he pull the string so that he does maximum work on the toy car?
John observed the motion of the football and said:
Gravity is doing negative work on the football
Assuming John is correct, what can we conclude from John's statement?
Alice climbed the red ladder in 5 seconds, and the blue ladder (which is twice as long) in 10 seconds.
Did she spend more energy climbing the red ladder, or the blue ladder?