Draw a free-body diagram for each of the following situations, Label your vectors: a)A book sitting on a table b)A yo-yo being swung around in a circle.

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Presentation transcript:

Draw a free-body diagram for each of the following situations, Label your vectors: a)A book sitting on a table b)A yo-yo being swung around in a circle by it’s string c)You, at the top of the power tower just as it is dropping.

A)What is the centripetal acceleration of a 10.0 kg object that moves with a linear velocity of 3.5 m/s at a radius of 5.0 m? B)What is the centripetal force?

2.45 m/s N

Billy hits a 0.25 kg pool ball across the pool table and sinks it in the side pocket. If the pool ball has a radius of 3.3 cm, what is its moment of inertia as it rolls?

A 100 kg 4 m long board is held up by two ropes as shown below. A load of 40 kg is placed on the board, what is the tension in each of the ropes?

Scott spins on the physics wheel with his arms out stretched with a speed of 2.0 m/s. From the center of his chest to his finger tips it is 92 cm. When he pulls his arms in from the center of his chest to his shoulder is 15 cm. With what speed will he be moving when he pulls his arms in?

Draw each of the following moon phases: Full moon waxing gibbous waning crescent Why do we see different moon phases?

The angle between the Earth and Moon lets us see different amounts of the Moon lit.

What two conditions must be met in order for a solar eclipse to occur? a. The Moon must be full and cross the plane of the Earth's orbit. b. The Moon must be full and not cross the plane of the Earth's orbit. c. The Moon must be new and not cross the plane of the Earth's orbit. d. The Moon must be new and cross the plane of the Earth's orbit.

d

When the Moon is located between the Earth and the Sun, we call it a a. new moon.b. full moon. c. blue moon.d. harvest moon.

a

Which moon phase would you observe if you were on the equator at midnight and the Moon was in its position closest to the Sun? a. quarter moonb. full moon c. crescent moond. You wouldn't see the Moon.

d

The temperatures on the Earth are different in the summertime and the wintertime because of a. The length of the day b. The pole is closer to the Sun in the summer c. The height of the Sun in the sky. d. Both a and c are correct.

d

If the Earth had twice its present mass, but the same radius, what would be the value of g? a m/s2b m/s2 c. 9.8 m/s2d. 4.9 m/s2

b

Does the more massive Earth attract the moon with a greater force, the same force, or less force than the moon attracts the Earth? Explain your answer.

THE SAME. NEWTON’S 3 rd Law!!!!

Calculate the gravitational force that the moon would exert on a 65.0 kg person on Earth. The moon is 3.84 x10 8 m from the Earth and has a mass of 7.35 x kg.

How much energy is contained in a 1 gram pencil?

In the following circuit rank the brightness of the bulbs.

C>A=B

Draw a circuit that has a 10 ohm resistor and a 20 ohm resistor in series with a 60 volt energy source. What is the total resistance? What is the current through the battery? What is the current flowing through the 20 ohm resistor?

Find the total resistance of the circuit below, find the current flowing through the battery and the current flowing through the 30 ohm resistor.

Total Resistance = 10 ohms Current through the battery = 6 amps Current through 30 ohm resistor = 2 amps