Question

Clara is shopping in a grocery store with her friend. Each has their own shopping cart in which they want to place their items. The shopping carts are identical. Clara and her friend add the same type and number of items to each of their carts. In the baking aisle, however, Clara adds 20 pounds of sugar to her own cart, and her friend adds only 10 pounds of sugar to her own cart. Which of the following statements best explains what Clara must do to accelerate at the same rate as her friend? A. She must add more sugar to her cart. B. She must apply more force to move her cart. C. She must add 20 pounds of salt instead of 20 pounds of sugar to her cart. D. She must apply less force to move her cart.

Answer 1

She must apply more force to move her cart.

Step-by-step explanation:

According to Newton's second law of motion, an object with a larger mass requires more force to accelerate it at a certain rate than an object with less mass. This means that an object with a larger mass requires more force to accelerate.

Initially, both carts have the same mass. If Clara and her friend push the carts with the same force, they will both walk together with their carts accelerating at the same rate. Since Clara added more sugar to her cart, her cart has more mass than her friend[?]s cart. Therefore, if she wants to accelerate at the same rate as her friend, she must apply more force to move her cart.

Answer 2

Clara adds 20 pounds of sugar to her cart while her friend adds only 10 pounds of sugar to her cart. that means clara's cart carry more mass as compared to her friend.

According to newton's second law , acceleration is given as

a = F/m

Since the clara's cart carry more mass, clara has to apply more force so that the acceleration of both the carts becomes equal.