HOMEWORK 1/13/23

A girl is pushing a full shopping cart straight down an aisle with increasing speed.

Which statement describes the shopping cart's motion?

• The girl has a constant velocity

• The girl is accelerating

A golf ball is sitting still on the grass three feet from the hole.

Which statement describes the golf ball's motion?

• The golf ball has a constant velocity

• The golf ball is accelerating

A baseball player is reducing his speed after running straight past first base.

Which statement describes the baseball player's motion?

• The player has a constant velocity

• The player is accelerating

Which of the following toys are accelerating?

• A toy boat is going north at 10cm/s

• A stuffed T-rex is sitting motionless on a shelf.

• A wooden model airplane is flying in loops at a constant speed.

Which of the following fruits are accelerating?

• A heavy coconut is speeding up as it falls to the ground.

• A papaya is moving at a constant speed on the conveyor belt.

• A ripe pear sits in a basket on the table.

Which of the following runners is accelerating?

• A runner on a straight track going 10m/s

• A runner slowing down at the finish line

• A runner sitting on the bench waiting on his race.

Which of the following bottles is accelerating?

• A bottle of water lodged in a bucket of ice at a party.

• A bottle of formula rolling at a constant speed away from the baby.

• A bottle of ketchup that is being passed around the table to the left.

A kangaroo hopped directly south toward a lake at a constant velocity for 16 seconds. It hopped 56 meters in that time. What was its velocity?

• 0.29 m/s south

• 3.5 m/s south

• 896 m/s south

A barracuda swam 6.4 meters directly toward a coral reef southeast at a constant velocity. It swam that distance in 2.0 seconds. What was its velocity?

• 3.2 m/s south

• 12.8 m/s south

• 0.31 m/s south

A remote-controlled helicopter flew 1,230 meters west at a constant velocity. It flew that distance in 98.4 seconds. During that time, it was passed by a pigeon that was flying at 22 meters per second. What was the helicopter's velocity?

• 22 m/s west

• 55.9 m/s west

• 121,032 m/s west

• 12.5 m/s west