Alisa, a skateboarder, is riding down a hill. If Alisa and the skateboard are considered a single object, what forces are acting on her? check all that apply

push

gravity

normal force

friction

tension

On a frictionless plane inclined at angle 303. The box is connected via a cord of negligible mass to a box of laundered money (mass m2 " 2.0 kg) on a frictionless plane inclined at angle u2 " 603. The pulley is frictionless and has negligible mass.

What is the speed of an arrow that takes 1.25 seconds to hit a target 75 meters away?

The cheetah is one of the fastest-accelerating animals, because it can go from rest to 16.2 m/s (about 36 mi/h) in 2.4 s. If its mass is 102 kg, determine the average power developed by the cheetah during the acceleration phase of its motion.

In which state of matter are water molecules measured as having the lowest temperature? A. solid ice B. liquid water C. water vapor

When earths shadow falls on the moon the shadow causes

Imagine you are holding an apple. Does this apple have energy? how do you know?

Explain how inertia and the shape of a loop counteract the force of gravity to keep riders from falling out when a roller coaster goes through a loop traveling upside down

Which is not a characteristic of an ideal fluid? A. high viscosity B. laminar flow C. constant density D. constant pressure

What type of weather system brings calm, clear weather?

What is one reason supporting genetic modifications to food