The key is in "they lock together". This tells you this is a complete inelastic collision and therefore you can use the formula:
m1*v1+m2*v2=v(m1+m2)
Plug in numbers:
2000*3+2000*2=v(2000+2000)
so v=2 m/s, obviously in the same direction of motion in which they were both moving.
Reaction is the answer. If you're wondering why, all you need to do is look up the definitions of the words.
Explanation:
Mass = density × volume
m = (0.7 g/mL) × (40 mL)
m = 28 g
Rounding to 1 significant figure, the student should weigh out 30 grams of diethylamine.
Answer:
A. The speed of the cylinder has decreased
Explanation:
The angular acceleration is the relation between the angular speed and the radius in this way so:
So solve to speed
Now assume the cylinder moved a new location R/2 so:
So the velocity decreased in the relation of the radius
The force applies an acceleration in the reverse direction of
29 N = (0.145 kg) <em>a</em> → <em>a</em> = 200 m/s²
and in order to hit the ball back with speed 40.0 m/s, this acceleration is applied over time <em>t </em>such that
200 m/s² = (40.0 m/s - (-40.0 m/s)) / <em>t</em> → <em>t</em> = (80.0 m/s) / (200 m/s²) = 0.4 s
