If we want to know the velocity that an object is traveling, we must know the

a. distance and time

b. distance and the speed

c. time and the direction

d. direction and speed

We can model a small merry-go-round as a uniform circular disk with mass 88 kg and diameter 1.8 m. How many 22 kg children need to ride the merry-go-round, standing right at the outer edge, to double the moment of inertia of the system?

If a projectile is fired with an initial velocity of v0 meters per second at an angle α above the horizontal and air resistance is assumed to be negligible, then its position after t seconds is given by the parametric equationsx = (v0 cos α) t y =

2. How many grams of water can be heated from 20.0°C to 75°C using 12500.0 Joules?

Why is the reflection of a wave at a free boundary different from reflection at a fixed boundary?

A ball is thrown downward with an initial speed of 7m/s. the balls velocity after 3 seconds is m/s

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?