1-My home is exactly 20 miles from UMKC. How far is that distance measured in meters?

2-How far did Aaron Judge hit the ball in this home run...in meters! To three sigfigs.

3-What was the average speed of the ball off Aaron Judge's bat? in m/s!

4-What was Coco Crisp's speed to the ball in meters per second?

5-What was Coco Crisp's distance that he covered...in meters!

6-Which of these states Newton's First Law of Motion?

a-The force acting on an object is equal to the mass of the object times the acceleration of the object in the same direction as the force.

b-An object at rest (or in motion in a straight line) will stay at rest (or in motion n a straight line) unless acted upon by an unbalanced force.

c-For every action there is a reaction of equal magnitude in the opposite direction.

7-In physics, an object's resistance to changing its motion, is known as

8-How does a large deceleration, which causes the brain to smash into the skull, cause damage to the brain?

a-It rips apart nerve cells which can't be put back together.

b-The brain gets "bruised" and loses elasticity

9-What is a g-force acceleration?

a-The speed of sound which is about 600 miles per hour

b-The force of a g-suit

c-9.8 m/s^2

10-How many g's of force can our brain withstand before getting a concussion?

a-4000 g's

b-300 g's

c-5 g's

11-What is the acceleration in meters per second-squared (m/s^2) of 15 G's? 1 g = 9.8 m/s^2

12-Those were some powerful forces that a woodpecker's head can withstand. The equation for force is F =ma. Where "m" is the mass of the object which we call the inertia, "F" is the net force and "a" is the acceleration of the object. As we saw in Chapter 1, mass is not the same thing as weight. In physics we define mass as the "inertia" of an object, or how hard it is to get it to change either its speed or direction.

The amount of force a human brain can withstand is 300 g's. The mass of the human skull is 5 kg. We will need to convert those 300 g's to m/s^2 to calculate this next question...

12-How many Newtons of force can the human school withstand? Remember 1 g = 9.8 m/s^2. The mass is 5.0 kg.

13-Based on your answer in Problem 8, what is your answer in pounds?

14-The equation/phrase that goes with Newton's 2d law is...

a-For every action there is a reaction in the opposite direction but with the same magnitude.

b-The "Impulse" is equal to the average force applied times the time the objects are in contact.

c-The force on an object that gets it to change its motion is equal to the mass of the object times the accelration

15-In the video with kicker Morten Andersen, the total time a kicker has to kick the ball in the NFL so that it doesn't get blocked is...

Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.

a-1.4 seconds

b-8 thousandths of a second

c-3 seconds

16-Let's calculate the acceleration of a placekicked football. In the video the time the foot of the kicker and the ball are in contact was 0.008 s. That's about 13 times fast than the "blink-of-an-eye"! The average speed of an NFL kick is 60 mph. I'll save you the pain of "Googling" that and tell you that is 26.8 m/s (meters per second). Thus the "change in velocity divided by the time of the contact" equals the acceleration.

17-Knowing the acceleration of the football, we computed in problem Q12, and the mass of the football is 0.43 kg, what is the force acted upon by the foot of the kicker on the football?