- 100 km/h
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Dynamics of rigid bodies
3) The 2-Mg car has a velocity v1= 100 km/h of when the driver sees an obstacle in front of the car. If it takes 0.75 s for him to react and lock the
brakes, causing the car to skid, determine the distance, in meters, the car travels before it stops. The coefficient of kinetic friction between the tires
and the road is μk = 0.25.
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- 1V1 O ©2023 ES AF VTV: 6:59 PM Sun Feb 20 6 Unit-5 Review A FA ALA LA FA 44 Question 8 70 kg ▶▶ 50 kg 490 N C Pause Q Zoom Two crates are dropped from the same height in a vacuum. The mass and force of the crates are shown in the diagram. 686 N Which of the following statements is supported by the data? O B. Both of the crates are accelerating at the same rate. Illuminate Education TM, Inc. O A. Both of the crates are falling at a constant speed. 1 A LA A LA Illuminate "Quick Code" The normal force will be the same on both crates when they hit the ground. T3. A system of masses is connected by a light cord passing over a pulley as shown m₁ = 2.5 kg य μ = 0.20 m₂ = 1.5 kg 40 a) Draw a labelled free body diagram for mass 2. b) What is the magnitude of the acceleration of the system of masses?3
- Problem 16 You can measure acceleration by measuring the deflection of a vertically hanging mass. Suppose an air freshener hangs from the rear view mirror of your car, which is initially at rest. You hit the gas pedal and notice that the air freshener is deflected at an angle of 15 degrees from the vertical. What is your car's acceleration?2- Motion of a solid on a rail The rail ABCD, represented in the figure below, is situated in a vertical plane, the frictional forces are negligible on the parts AB and CD of the rail, but those on BC are equivalent to a force of magnitude f = 3 N. (S) B Given: h = 1.8 m, a = 30°, BC = 0.7 m and g = 10 m/s². %3D A punctual solid (S) of mass m = 0.25 kg is launched without speed from the point A. Applying the kinetic energy theorem on (S) calculate: 1)The speed of (S) at B ; 2)The speed of (S) at C ; 3)The length CD, where D is the highest point reached by (S) on CD.Two masses are connected by a light string that runs over a frictionless pulley as shown. What is the acceleration of the system when the masses are released and allowed to move?