The 1.23kg physics book shown is connected by a string to a 505.0g coffee cup. The book is given a push up the slope (call this direction positive) and released with a speed of 2.21m/s. The coefficients of friction are μs = 0.450 and μk = 0.221. a) What is the acceleration of the book if the slope is inclined at 30.0°?

b) How far does the book slide before it has zero speed?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?