Hello, i just wanted to ask someone to correct my work and to check if everything is correct. you!

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

Aperson standing in a canoe exerts a force of 700 n to throw an anchor over the side. find the acceleration of the canoe if the total mass of the canoe and the person is 100 kg?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.