A 14.5 kg wheelbarrow starts at the bottom of an incline traveling at a speed of 19.4 m/s. The wheelbarrow then goes up a grassy incline with friction a distance of 6.7m and decreases speed to 9.5 m/s. the height of the incline is 0.8m. what is the magnitude of the frictional force exerted on the wheelbarrow?

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

the rearrangement of particles in a physical change. hope this

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.