A car travels 10 miles East in 30 minutes. What is its velocity in miles per hour?

Velocity = 20 mph

Explanation:

Distance = 10 miles

Time = 30 min = 0.5 hour

Velocity = distance/time

              = 10miles/0.5 hour

              = 20 mph

The car's velocity is

20 miles per hour East.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.