Physics Answers

Which of the Celsius, Fahrenheit, and Kelvin scales allow negative temperatures? Explain.

A coin is placed at the top of a two-story building, having a potential energy of 20 J. If it has a mass of 2.50 grams, what would be its velocity upon hitting the ground?

A machinist is using a wrench to loosen a nut. The wrench is 25.0 cm long, and he exerts a 17.0-N force at the end of the handle at 37° with the handle. (a) What torque does the machinist exert about the center of the nut? (b) What is the maximum torque he could exert with this force, and how should the force be oriented?

find the tension in the strings ab and bc in the figure shown if the suspended weight is 30 N

How does the ideal mechanical advantage (IMA) of an inclined plane vary

with the angle 𝜃 of the plane; that is, what trigonometric function of 𝜃 gives the value of IMA?

12. A graduation cap is thrown straight up from the ground with an unknown velocity. It reaches its highest point after 12 s. With what Initial velocity did it leave the ground? Formula: v0 = v -gt

13.Using his elastic powers, Luffy launches himself forward, from rest, with an acceleration of 11 m/ If he covered 24 m, what was his final velocity?

Formula: v = 2ax

14. Doc Ock scales a bridge with an acceleration of 2.5 m/s'. As a result, the accelerates from rest to 8.6 m/s. How much distance did he cover?

Formula: v = 2ax

15. A Honda Civic accelerates from rest to 26 m/s over a distance of 65 m. What acceleration experience?

Formula: v= 2ax

6. An object is moving at a velocity of 30 m/s. It accelerates to a velocity of 5 m/s over a time of 12.5 s. What acceleration did it experience?

Formula: a = (v - v0)

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t

 5. A WW Beetle is traveling at a constant velocity of 12 mu's when it experience of 2.5 m/s for a time of 20 What was velocity be after that acceleration?

Formula: v = v0 + at

10. A tiger races after a deer with a constant acceleration of seconds was it running for? Formula x = 1/2 at2

11. What is the velocity of a dropped iron after it has fallen for 95?

Formula: v= v0 + gt

determine the average gravitational force between a 1.05 solar mass and a planet whose orbital speed is 20,000 m/s if its distance from the star is 149 million kilometers at its nearest and 150 million kilometers at its farthest.

9. Bakugo is initially at rest but then darts forward 800 min 125. What is his acceleration? Formula: x= 1/2 at2

8. A Ford Mustang racing at NASCAR accelerates at a rate of 60 m/s for 2.0s. How far does it move Formula: x= 1/2 at2

7.. An object initially at rest experiences an acceleration of 9.8 ms. How much time will it take to achieve a velocity of 49 m/s?

Formula: t = v - v0

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a

What is the effciency of a rope and pulley system if a painter uses 1.93 kh of mechanical energy to pull on the rope and lift a 20 kg paunt barrel at constant speed to a height of 7.5 above the ground