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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?
Use Fermi calculations to ESTIMATE number of coins that is required to build a tower to reach the moon (note that it impossible to build a tower with that height).
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
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
