Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up to 45 ms. It it takes a train 8 seconds to reach 45 m/s, what is the acceleration of the train? (Round your answer to the
nearest whole number)
Sms
6 mis?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?