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In the system shown in the figure, suppose the block has a mass of 3.3 , the spring has a force constant of 450 , and the coefficient of kinetic friction between the block and the floor is 0.19. (Figure 1) Find the work done on the block by the spring and by friction as the block is moved from point A to point B along path 2. Find the work done on the block by the spring and by friction if the block is moved directly from point A to point B.
The minimum stopping distance for a car travelling at a speed of 30 {rm m/s} is 60 {rm m}, including the distance travelled during the driver's reaction time of 0.54 {rm s}.
To stretch a certain spring by 3.00 from its equilibrium position requires 9.50 of work. What was the maximum force required to stretch it
q1. a 1040 kg car carrying four 80 kg people travels over a rough washboard dirt road with corrugations 2.0 m apart
A 220 g block on a 50 cm long string swings in a circle on a horizontal, frictionless table at 95.0 rpm. what is the tension on the string.
To push a 32 kg crate up a frictionless incline, angled at 34° to the horizontal, a worker exerts a force of 280.6 N, parallel to the incline. What is the total work done on the crate
A uniform 240 N ladder rests against a perfectly smooth wall, making a 40.0 angle with the wall. Find the normal forces that the wall on the ladder
A car traveling on a flat (unbanked) circular track accelerates uniformly from rest with a tangential acceleration of at. Determine the coefficient of static friction between the car and track from these data
The speed of light in a certain medium is 2.2E10^8 m/s. What is the index of refraction of this medium
A 1kg ball with a speed of 3 m/s collides head on, elastically, with a 2 kg ball moving at 1 m/s. What will be the velocity of each ball after the collision
After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 3.02 km away, What distance did the dog run
Burning a pound of coal produces about 13,000 Btu of energy. How many megajoules of energy are produced by burning 4 pounds of coal?
q1. what are sunspots and how are they related to suns magnetic field? is a magnetic field stronger weaker in sunspots?
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