Frank stands still while throwing a dart toward a target with a speed of 25 m/s.

What is the speed of the dart observed by Frank compared to the speed observed by a stationary observer?

The speed is 25 m/s for both people.

The speed is greater than 25 m/s for Frank only.

The speed is greater than 25 m/s for the observer only.

The speed is less than 25 m/s for both people.

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?