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1)A crate of potatoes of mass 19.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.82 and μk = 0.29. Find the frictional force (magnitude and direction) on the crate if the crate is sliding down the ramp. 2) A car travels east at 89 km/h for 5.0 h. It then travels 45.0° east of north at 105 km/h for 5.0 h. (a) What is the average speed for the trip? (b) What is the average velocity for the trip? magnitude direction ° north of east 3)A block of mass m1 = 4.0 kg rests on a frictionless horizontal surface. A second block of mass m2 = 2.2 kg hangs from an ideal cord of negligible mass that runs over an ideal pulley and then is connected to the first block. The blocks are released from rest. (a) Find the acceleration of the two blocks after they are released. block 1: magnitude m/s2 direction block 2: magnitude m/s2 direction (b) What is the velocity of the first block 1.1 s after the release of the blocks, assuming the first block does not run out of room on the table and the second block does not land on the floor? magnitude m/s direction (c) How far has block 1 moved during the 1.1-s interval? m (d) What is the displacement of the blocks from their initial positions 0.10 s after they are released? block 1: magnitude m direction block 2: magnitude m direction
A ball is thrown toward a cliff of height (h) with a speed of30 m/s and an angle of 60 degrees above the horizontal. What is the ball's impact speed
A turtle ambles leisurely-as turtles tend to do-when it moves from a location with position vector r1,x = 1.49 m and r1,y = -2.77 m in a lettuce garden to another location, with position vector r2,x = 3.77 m and r2,y = -4.19 m, where the lettuce a..
If 70% of a radioactive sample has decayed in 5.0 x 103 years, what is the decay constant of the material
Describe the interference of two wave pulses with different amplitudes if they are a) in phase and b) completely out of phase
A vertically hanging steel wire has the following properties. Length=8.75m, Cross-Sectional area= 0.375 cm cubed. Y=2.10x10^11 Pa, B=1.62x10^11 Pa, S= 0.871x10^11 Pa, Proportional Limit=3.27x10^8 Pa, breaking stress=17.4x10^8 Pa.
Calculate the pressure at the center of pipe A. Suppose T = 10?C.
A 3.1-cm-tall object is 47 cm in front of a converging lens that has a 11.8 cm focal length. Calculate the image position and height. position cm height cm.
Vector A has a magnitude of 8 units and makes an angle of 45.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. (Using graphical methods), find (a) vector sum A + B and (b) vector diffe..
A 3.0-kg block sits on top of a 5.0-kg block which is on a horizontal surface. If the force is 10% greater than your answer for (a), what is the acceleration of each block
A destroyer sends a sonar pulse out to detect a submarine directly below the ship in the ocean. find how deep is the submarine
he driver finds that the car bounces up & down with maximum amplitude when he drives at a speed of 4.2 m/s (approx 9.4 mph). The car then stops & picks up three more 110 kg passengers. By how much does the car body sag on its suspension when these ..
Suppose a news report stated that starship Enterprise had just returned from a 5 year voyage while traveling at 0.81c. If the report meant 5.0 years of Earth time, how much time elapsed on the ship
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