F&M

Question 1

two mail trucks are loaded with mail. The trucks are the same. But they are carrying different amounts of mail. The trucks begin to move at the same speed. Which truck needs a larger force to start moving? A mail truck carrying 550 pound of mail or a mail truck carrying 420 pound of mail.

Answer 1

A mail truck carrying 550 pounds of mail.

Question 2

Two movers are putting heavy boxes into their truck. The boxes are the same shape and size. Each mover lifts one box up into the truck at a time. The movers lift the boxes at the same speed. Which box is lifted with a larger force? a box holding 29 pounds or a box holding 37 pounds?

Answer 2

a box holding 37 pounds

Question 3

Carter gives two friends a ride in his wagon. One friend sits in the wagon at a time. Carter starts to pull the wagon across the yard. To move the wagon at the same speed each time, which friend does Carter need to pull with a large force? a friend who weighs 28 pounds or a friend who weighs 31 pounds?

Answer 3

a friend who weighs 31 pounds

Question 4

Two students get ready to leave school. The students have the same rolling backpacks. Each student has different books in her backpack. The students start rolling their backpacks at the same speed. Which backpack is pulled with a larger force? A backpack carrying 7 pounds or a backpack carrying 9 pounds?

Answer 4

A backpack carrying 9 pounds

Question 5

A moving van takes a family’s boxes to their new house. The van’s driver foes the speed limit every time she makes a trip. She always takes the same amount of time to ship. What size force is needed to ship the moving van with each load? Order the objects from largest force to smallest force.

Answer 5

1. a load that weighs 490 pounds
2. a load that weighs 455 pounds
3. a load that weighs 433 pounds

Question 6

Meg wants to test homemade go-karts before a big race. The go-karts are all the same. She gives each of her friends a ride in a go-kart. She pushes each go-kart to make it start rolling at the beginning of each ride. Meg makes sure that all of her friends got to ride at the same speed. What size force is needed to start each ride? Order the objects from largest force to smallest force.

Answer 6

1. A go-kart carrying a friend with a mass of 50 kilograms
2. A go-kart carrying a friend with a mass of 46 kilograms
3. A go-kart carrying a friend with a mass of 40 kilograms

Question 7

A farm horse pulls carts from the field to the barn. The carts are the same. The farmer puts different crops in each cart. The horse pulls each cart at the same speed. What size force is needed to move each cart? Order the objects from largest to smallest force.

Answer 7

1. a cart holding 325 pounds
2. a cart holding 300 pounds
3. a cart holding 225 pounds