What was the rocks average velocity as it fell

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Reference no: EM13803829

As a baseball is being thrown, it goes from 0.0 to 40.0 m/s in 0.18 s.

(a) What is the acceleration of the baseball?

(b) What is the acceleration in g's?

A child sits on the edge of a spinning merry-go-round that has a radius of 3.0 m. The child's speed is 5 m/s. What is the child's acceleration?

During a NASCAR race a car goes 78 m/s around a curved section of track that has a radius of 240 m. What is the car's acceleration?

Initially stationary (the train starts at rest), a train has a constant acceleration of 0.6 m/s².

(a) What is its speed after 38 s?

(b) What would be the total time it would take to reach a speed of 43 m/s?

A rock is dropped off the side of a bridge and hits the water below 5.9 s later.

(a) What was the rock's velocity when it hit the water? Speed?

Direction?

(b) What was the rock's average velocity as it fell? Speed?

Direction?

During takeoff, an airplane goes from 0 to 56 m/s in 9 s.

(a) What is its acceleration?

(b) How fast is it going after 4 s?

A high-performance sports car can go from 0 to 100 mph in 8.0 s. (Assume the car travels in the positive direction. Indicate the direction with the sign of your answer.)

(a) What is the car's average acceleration (in SI units; meter-kilogram-second)?

(b) The same car can come to a complete stop from 26 m/s in 5.7 s. What is its average acceleration?

A passenger jet flies from one airport to another 1,353 miles away in 2.7 h. Find its average speed in the mks system of units.

What are the "basic" or "fundamental" physical quantities? (Select all that apply.) ___mass
___speed
___area
___distance
___time

Why are they called that?

10.

List the physical quantities identified in this chapter. From which of the fundamental physical quantities is each derived? Which of them are vectors, and which are scalars?

11.

What is the distinction between speed and velocity? Describe a situation in which an object's speed is constant but its velocity is not.

12.

What does the slope of a distance-versus-time graph represent physically?
___area
___time
___velocity
___displacement
___acceleration

Reference no: EM13803829

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