Quiz 2

An object moves 10m east in 10s and then returns to its starting point taking an additional 40.0s. If west is chosen as the positive direction, what is the average speed of the object?

0.4m/s

A truck moves 80.0m east, then moves 140m west, and finally moves east again a distance of 80.0m. If east is chosen as the positive direction, what is the truck's resultant displacement?

20.0m

A cart is given an initial velocity of 5.0 m/s and experiences a constant acceleration of 2.4 m/s^2. What is the magnitude of the cart's displacement during the first 5.0 s of its motion?

55m

A cheetah can run at approximately 100km/hr and a gazelle at 80.0km/hr. If both animals are running at full speed, with the gazelle 50.0m ahead, how long before the cheetah catches it's prey?

9.0s

Jeff throws a ball straight up. For which situation is the vertical velocity zero?

at the top

Displacement is which of the following types of quantities?

vector