1. Motion and Forces Discussion Q’s
HPS 2019
30 minutes…

2. Directions
You’ll discuss the following questions in your color groups.
The tallest person will create a google doc and share with the group members.
The shortest person will be the recorder.
The other members will alternate as spokesperson.

3. Can an object be in motion when forces are balanced?
Question 1
Can an object be in motion when forces are balanced?
If a force is applied to an object and then released, it is possible for that object to be in motion, at least for a little bit, before coming to a stop. EX: sliding a soda across the table, pushing a dog on a skateboard, etc.

4. Question 2
Does the acceleration of an object always have to be in the same direction the object is moving?
No. It is possible for an object to be slowing down, which would result in the acceleration being in the opposite direction of the object.

5. Question 3
How is a seatbelt related to Newton’s 1st Law of Motion?

6. Explain another real-life example of Newton’s 1st Law.
Question 4
Explain another real-life example of Newton’s 1st Law.
While driving on an icy road, you try to turn a corner. Your car turns but continues to go straight.

7. Question 5
Which has more inertia: an elephant taking a nap or a baseball going 95 mph? Explain.
Elephant taking a nap. It is mass dependent.

8. Question 6 What is Newton’s 2nd Law of Motion? Use the law to solve:
What is the acceleration of a 2,000-kg truck if a force of 4,200 N is used to make it move forward? 2 m/s2
How much force is needed to accelerate a 68 kg skier at a rate of 1.2 m/s2? 82 N
What is the mass of an object that needs a force fo 4,500 N to accelerate it at a rate of 5 m/s2? 900 kg

9. What is Newton’s 3rd Law of Motion? Explain a real-life example.
Question 7
What is Newton’s 3rd Law of Motion? Explain a real-life example.
When you jump, your feet exert a force on the ground, while the ground exerts a force on your feet.