1. A 2,000-kg car is sitting at rest in a parking lot. A bike and rider with a total mass of 60 kg are traveling along a road at 10 km/h. Which system has more inertia? Why?

a) The car has more inertia, as its mass is greater than the mass of the bike.

b) The bike has more inertia, as its mass is greater than the mass of the car.

c) The bike has more inertia, as its velocity is greater than the velocity of the car.

d) The car has more inertia, as its mass is less than the mass of the bike.

2. Two people push a 2,595-kg car to get it started. An acceleration of at least 9.3 m/s2is required to start the car. Assuming both people apply the same magnitude force, how much force will each need to apply if friction between the car and the road is 258 N?

3.

What is the net external force on an object in freefall on Earth if you were to neglect the effect of air?

a) The net force is zero.

b) The net force is upward with magnitudemg.

c) The net force is downward with magnitude 9.8 N.

d) The net force is downward with magnitude mg.

4. If a marathon runner runs 2.84 miles to the left, 6.67 miles to the right and 4.52 miles forward, then what is the final displacement of the runner? Be sure to report your answer using the proper number of significant figures.

5.

In the equation for the maximum height of a projectile what does 'Uuy stand fer