9. Granny's dead car (m = 1600 kg) is coasting at a velocity of 14.0 m/s (this is approximately 30 mph) on a level surface. She slam on the brakes, locking the wheels, and it comes to rest due to friction after it travels a horizontal distance of 14 m. What is the coefficient of kinetic friction between the tires of her car and the surface? (g = 9.8 m/s²)
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- You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 1515 lb and was traveling eastward. Car B weighs 1125 lb and was traveling westward at 43.0 mph. The cars locked bumpers and slid eastward with their wheels locked for 17.5 ft before stopping. You have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . What speed ? (in miles per hour) was car A traveling just before the collision? (This problem uses English units because they would be used in a U.S. legal proceeding.).3. An urban myth states that a penny dropped from the top of the Empire State Building (1440 ft tall) in NYC could be lethal. Ignore air friction and find the final velocity of the penny.A truck is traveling at 11.8 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 13° with respect to the horizontal. The coefficient of kinetic friction between the tires and the road is 0.956. How far does the truck skid before coming to a stop? Number Units
- 4. Two objects with different masses (m₁ and m₂ such that m₁ < m₂) are traveling at equal velocities, v, along a horizontal frictionless surface. They both slide up the same frictionless hill (see diagram). (a) Which object rises to a greater height? (b) What is this height in terms of the given parameters? (g = 9.8 m/s²) m₂ m₁ V hA driver in a 1000.0kg car traveling at 28 m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the road is 0.80, how long will the skid marks be? O 50 m 63 m 40 m O 47 mAs a science fair project, you want to launch an 700 g model rocket straight up and hit a horizontally moving target as it passes 26.0 m above the launch point. The rocket engine provides a constant thrust of 17.6 N. The target is approaching at a speed of 17.0 m/s. # 3 E D 80 F3 C 4 R F 888 V % 5 F5 T G ^ 6 B ▼ Part A At what horizontal distance between the target and the rocket should you launch? Express your answer with the appropriate units. FO Provide Feedback Y Value Submit MacBook Air H HA & 7 N F7 Request Answer U ** → 8 Units DII FB 1 M wwww. ? ( 9 K DD O :) O F10 P F11 1
- B81. The 10-lb block has a speed of 4 ft/s when the force of F = (8t?) Ib is applied. Determine the velocity of the block when it moves s = 20 ft. The coefficient of kinetic friction at the surface is Uz = 0.15. Note: It's okay to use an online equation solver to calculate a number in this problem! v = 4 ft/s F = (8f) lb23. Two blocks are attached to a light string. Block A (mA=7.9kg) is at rest on a frictionless table. Block B (mB=1.36kg) hangs off the edge of the table, as shown. Both blocks are released from rest.Using the single-system approach, what is the acceleration of the system?a= ms2 Block A is on a table and block B is hanging off the table on a rope connecting the two blocks*Round your answer to the nearest thousandth if necessary.
- The figure shows a graph of E102 Part 1. The mass of the object is 0.696 kg. Which of the following is correct? Force (N) 1.0 0.80 0.60 0.40 0.20 0.0 0.0 1.0 است 2.0 3.0 4.0 Time (s) 5.0 6.0 7.0 8.0 The kinetic friction is 0.80 N and the starting friction is 0.52 N. The coefficient of static friction is 0.076. The coefficient of kinetic friction is 0.117. The kinetic friction is 0.52 N and the starting friction is 0.80 N.Hi please help with the following: After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, the batter decides to keep going past second base and try for third base. The 59 kg player begins sliding 3.40 m from the base with a speed of 4.35 m/s. If the player comes to rest at third base, what was the coefficient of kinetic friction between the player and the ground?