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A father pulls his child on a sled by pulling on rope over his shoulder. He exerts a force of 50 N at an angle of 30*.
a) Using the coefficient of friction for steel on ice, calculate the acceleration of the sled if its mass plus the child's is 20 kg, assuming the sled is already in motion.
b) What minimum force must the father exert to start the sled moving from rest?
A girl pulls her brother along on a wagon. She pulls with a force of 35 N in a direction of 29.2 degrees to the horizontal, How much work is done be the girl
Find the relationship between the length h and width a of a regular right triangular prism such that the prism is equally likely to land on each face when: A. dropped from a great height in th air.
four charges, q1=1.5 nC, q2=4nC, q3=20nC and q4=-1nC are placed so that q4=(0,0) q1 is north of q4 and .5m away q2 is east of q4 and 1.0m away q3 is SW of q4 at angle of 36.9 degrees
A short time later, all of the charge has left the capacitor and the current flowing through the inductor has reached its maximum value. What is this current
the deflection plates in an oscilloscope are 10cm by 2cm with a gap distance of 1mm. a hundred volt potential
A particle of positive energy approaches the square well illustrated in fig from the left. some of the wave will be transmitted and some will be reflected. calculate the transmission amplitude.
A baseball is seen to pass upward by a window 23 m above the street with a vertical speed of14 m/s. The ball was thrown from thestreet. What was its initial speed? What altitude does it reach
A tennis ball of mass m = 0.059kg and speed v = 21m/s strikes a wall at a 45o angle and rebounds with the same speed at 45o. What is the magnitude of the impulse given to the ball
A 65 diver stands at the end of a 27 springboard. What is the magnitude of the vertical force exerted by the hinge on the board
Question/Prompt: Discuss all 3 components of the Dual-Store Model of Memory. Give an example of the development of a piece of information through all 3 structures of your memory according to the Dual-Store Model.
What is the electric force between a glass ball with 2.0 µC of charge and a rubber ball with-4.5 µC of charge when they areseparated by 5 cm? (N)
A sign has a mass of 1050 kg, a height h = 1 m, and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. What is the smallest value of the coefficient of friction
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