A flatbed truck is carrying a 20.0-kg crate along a level road. The coefficient of static friction between the crate and the bed is 0.400, and the coefficient of kinetic friction is 0.300
What is the maximum acceleration that the truck can have if the crate is to stay in place relative to the truck?
A) 8.00 m/s2 B) 3.92 m/s2 C) 196 m/s2 D) 78.5 m/s2 E) 7.84 m/s2
B
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The purpose of an air bag in an auto is to
A. decrease the force applied to you during a collision. B. reduce your speed just before a collision. C. reduce the impulse on you during a collision. D. make your momentum change occur over a shorter time during a collision.
A glass tea kettle containing 500 g of water is on top of the stove. The portion of the tea kettle that is in contact with the heating element has an area of 0.090 m2 and is 1.5 mm thick
At a certain moment, the temperature of the water is 75°C, and it is rising at the rate of 3 C° per minute. What is the temperature of the outside surface of the bottom of the tea kettle? The thermal conductivity of glass is 0.840 W/(m•K). Neglect the heat capacity of the kettle. A) 39°C B) 92°C C) 120°C D) 86°C E) 77°C
Pumped water storage has too many practical reasons why it cannot be done
What will be an ideal response?
The gyromagnetic ratio