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(b) A 1500 kg car loses speed (40.0 m/s to 30.0 m/s) over a distance of 100 m when sliding with the wheels locked.

i. What is the acceleration of the car? At the bottom of the ramp, the toy car continues with the speed obtained with no change in velocity. Answer: 12 s b. 35 N c. 49 N d. 20 N 9.

A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, another ball is dropped from a building 15 m high. A thin hoop, a solid disk, and a solid sphere, each with the same mass and radius, are at rest at the top of an inclined plane. Explore forces and motion as you push household objects up and down a ramp. The direction of motion (left or right) When the experiment is performed, the student is surprised to observe that the objects separate after the collision and that object B subsequently moves to thc right with a speed 2.5vo . a. Lower and raise the ramp to see how the angle of inclination affects the parallel … Exam 3 Practice Solutions Multiple Choice 1. The mass of the block is 5.0 kg. Answer: 1.7 m/s2 a. The speed ii.

acceleration along the ramp onto the freeway. The car starts from rest, moves in a straight line, and has a speed of 20 m/s when it reaches the end of the 120-m ramp.
After how long will the balls be at the same height? 1.18. If all three are released at the same instant, in which order will they reach the bottom? A 5.20kg block is set into motion up an inclined plane with an initial speed of v i = 8.40 m/s (see gure below). You’ll start by giving students the basic ingredients—marbles, cardboard tubes, masking tape, and building blocks—and asking them to use these ma-terials to get the marbles rolling. The block comes to rest after traveling d = 3.00 m along the plane, which is inclined at an angle of = 30:0 to the horizontal. (c) Determine the following for object A immediately after the collision. Solve: Dot Time (s) x (m) 1 0 0 2 2 30 3 4 95 4 6 215 5 … If a horizontal force is slowly increased until it is barely enough to make the block start moving, what is the net force on the block the instant that it starts to slide? A rock is swung on the end of a rope in a horizontal circle at constant speed… 12 N b. Calculate the coefficient of kinetic friction between the tires and road. The speed ii. i. (c) A block of mass 23.0 kg is moved at a steady speed of v = 15.0 m/s with an external force of 35.0 N. Calculate the power delivered by this force. • a) For this motion, determine the change in the block’s kinetic energy.
Midway through the first session, rollways of various sorts will be sprouting from chairs, shelves, and tables, and the marbles themselves will be moving.
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