What is the speed of a garbage truck that is 1.60×104 kg and is initially moving at 28.0 m/s just after it hits and adheres to a trash can that is 86.0 kg and is initially at rest

Assuming the mass of the garbage truck is kg, the speed of the garbage truck is .

Explanation:

This is conservation of momentum where both objects stick at the end so they have the same final velocity so our equation is:

To solve for the final velocity, just divide by the sum of both masses:

So, plug in the known values (remember initial velocity for the trash can is 0):

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s