Mastering Physics Solutions: Two Blocks and a Pulley

Mastering Physics Solutions: Two Blocks and a Pulley

On February 9, 2014, in Chapter 04: Force and Motion, by Mastering Physics Solutions

Part = 1.56 kg

Find the mass of block 2, m2.

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Mastering Physics Solutions: Sliding in Socks

Mastering Physics Solutions: Sliding in Socks

On January 19, 2014, in Chapter 05: Work and Energy, by Mastering Physics Solutions

Part A = 1.84 m
Part B = 1.55 m

If your speed is 3.00 m/s when you start to slide, what distance will you slide before stopping?
If her mass is 20.0 kg, what distance d does she slide (i.e., how far does she move after the push ends)? Remember that the friction force is acting anytime that she is moving?

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Mastering Physics Solutions: Sound Waves Traveling Down a String

Mastering Physics Solutions: Sound Waves Traveling Down a String

On November 28, 2013, in Chapter 13: Vibrations and Waves, by Mastering Physics Solutions

Part A = 0.26 s

If the string is 9.5 m long, has a mass of 55 g and is pulled taut with a tension of 7.5 N, how much time does it take for a wave to travel from one end of the string to the other?

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Mastering Physics Solutions: At the Galaxy’s Core

Mastering Physics Solutions: At the Galaxy’s Core

On November 5, 2013, in Chapter 07: Circular Motion and Gravitation, by Mastering Physics Solutions

Part A = 4.26 * 10^37 kg
Part B = 2.14 * 10^7
Part C = no
Part D = 6.31 * 10^10 m
Part E = yes

Determine the mass of the massive object at the center of the Milky Way galaxy.
Express your answer in solar masses instead of kilograms, where one solar mass is equal to the mass of the sun, which is 1.99 * 10^30 kg.
Observations of stars, as well as theories of the structure of stars, suggest that it is impossible for a single star to have a mass of more than about 50 solar masses. Can this massive object be a single, ordinary star?
Many astronomers believe that the massive object at the center of the Milky Way galaxy is a black hole. If so, what is its Schwarzschild radius Rs?
Would a black hole of this size fit inside the earth’s orbit around the sun? The mean distance from the sun to the earth is 1.5 * 10^11 m.

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Mastering Physics Solutions: Catching a Ball on Ice

Mastering Physics Solutions: Catching a Ball on Ice

On October 23, 2013, in Chapter 06: Linear Momentum and Collisions, by Mastering Physics Solutions

Part A = 6.72 cm/s
Part B = 11.0 cm/s

If Olaf catches the ball, with what speed vf do Olaf and the ball move afterward?
If the ball hits Olaf and bounces off his chest horizontally at 7.40 m/s in the opposite direction, what is his speed after the collision?

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Mastering Physics Solutions: A Ball Hits a Wall Elastically

Mastering Physics Solutions: A Ball Hits a Wall Elastically

On October 23, 2013, in Chapter 06: Linear Momentum and Collisions, by Mastering Physics Solutions

Part A = θf = θi
Part B = F = 2mvisin(θf)/(Δt)

What is the final angle θf that the ball’s velocity vector makes with the negative y axis?
What is the magnitude F of the average force exerted on the ball?

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