Chapter 15, Problem 100P

During a brake test, the rear-engine car is stopped from an initial speed of 98 km/h in a distance of s = 54 m. If it is known that all four wheels contribute equally to the braking force, determine the braking force F at each wheel in N. Assume a constant deceleration for the 1,446-kg car. Use g = 9.81 m/s?

At the instant shown, the spring is undeformed. Determine the change in potential energy if the 20 kg disk (kG = 0.5 m) rolls 2 revolutions without slipping.        ½(200)(1.2 π )2 + (20) (9.81) (1.2 π sin 30°)     - ½(200)(1.2 π )2  - (20) (9.81) (1.2 π sin 30°)     ½(200)(1.2 π )2  - (20) (9.81) (1.2 π sin 30°)     ½(200)(1.2 π )2

0.6*K2 m- K1 m/s K1=2 К2-8 K4=2 k=50*K4 N/m B 4- The 2 kg smooth cylinder collar has a downward speed K1 m/s when it is at s=0 m. The natural length of the spring is 0.3*K2 meters and it has a spring constant of 50*K4 N/m. As the collar goes down with the specified initial velocity, it stops momentarily when s = Sg. a. Determine a datum point on the figure b. Calculate the initial kinetic energy of the system c. Calculate initial elastic and gravitational potential energy of the system d. Calculate the kinetic energy when s = Sg. e. Determine the Sg value using the conservation of energy. f. Calculate elastic and gravitational potential energy of the system s = Sg.

The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, θθ = 34°, θ˙θ˙ = 43 deg/s, and θ¨θ¨ = 10 deg/s2. Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.3-kg slider B. Neglect all friction, and let L = 0.88 m. The motion occurs in a vertical plane.

The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, 0 = 34°, 0 = 43 deg/s, and Ö = 28 deg/s². Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.6-kg slider B. Neglect all friction, and let L = 0.75 m. The motion occurs in a vertical plane. 0 -L- B m

A catapult is used to throw large projectiles by the ancient civilization. If a catapult swung from rest position and shot a 10-kg projectile at a velocity of 50 meters per second. Determine the force in Newtons exerted by the catapult on the projectile.

The tractor is used to lift the 170-kg load B with the 24-m-long rope, boom, and pulley system. The tractor travels to the right with an acceleration of 4 m/s² and has a velocity of 5 m/s at the instant SA = 5 m. When SA = 0, SB = 0. (Figure 1) Figure 12 m -SA 1 of 1 Part A Determine the tension in the rope at this instant. Express your answer to three significant figu T = Value N Submit Previous Answers Request Answ X Incorrect; Try Again

The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, 0 = 35%, 0 = 39 deg/s, and Ö = 15 deg/s². Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.2- kg slider B. Neglect all friction, and let L = 0.68 m. The motion occurs in a vertical plane. 0 -L B m

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