Question

8) Farah and Athena were attempting to push Kieran on the scooter with enough force so
that Kieran would run into Mr. Collins. They figured out they needed a 50 N force to run
the scooter into Mr. Collins. Farah and Athena were both applying force from the left,
Farah applying a 20 N force and Athena pushing with a force of 15 N. Were they able to
get Kieran to run into Mr. Collins?
How can they get it to hit him?

Answer 1

A. They were not able to get Kieran to run into Mr. Collins

B. They will need an extra force of 15 N in order to hit him.

A. How to determine if they will hit Mr. Collins

From the question given above, the following data were obtained:

• Force 1 (F₁) from the left = 20 N
• Force 2 (F₂) from the left = 15 N
• Force needed (F) = 50 N

• Net force (Fₙ) =?

Fₙ = F₁ + F₂

Fₙ = 20 + 15

Fₙ = 35 N

From the question given above, the force needed to hit Mr. Collins is 50 N.

Thus, we can conclude that they were not able to hit him since their combined force is less than 50 N (i.e 35 N)

B. How to determine the extra force needed

• Force needed (F) = 50 N
• Net force (Fₙ) = 35 N
• Extra force needed =?

Extra force needed = Force needed – Net force

Extra force needed = 50 – 35

Extra force needed = 15 N

Thus, they will need an extra force of 15 N to hit Mr. Collins

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