Given: The weight W = 1.2 kN. The sum of the moments about A due W and the force exerted at the end of the bar by the rope is zero. Required: The tension in the rope is _ kN (1.2 kN) 60° 2 m W 2 m
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- A uniform rod AB of weight 500 N and length 4.0 m is supported at two points P and Q as shown below. AP = QB = 0.80 m. A man of weight 800 N is walking from Q to B. Find the maximum %3D %3D distance x from Q the man can walk before the rod topples about Q. P Q A 1 -| × |- O 0.4 m O 0.8 m O 0.75 m O 0.6 mI drive a Nissan Leaf to work. With the e-pedal on, the motor recovers energy through braking very aggressively. I need about 7 KW-hour to come to school if I use mostly the freeways. That’s about 5 KW-hour if I take mostly local streets. From the energy perspective, can you offer an explanation to explain this difference?Consider the setup shown below. The blocks have masses 3.6 kg and 24 kg. The pulley has mass 7.4 kg, and is a uniform disc with radius 0.23 m. Assume the pulley to be fric- tionless, but the coefficient of friction between the block and the surface is 0.36. a T2 3.6 kg T1 = 0.36 22° 24 kg What is the acceleration of the blocks? As- sume the 24 kg mass is descending with accel- erațion a. The moment of inertia of the disk is - M R? and the acceleration of gravity is 2 9.8 m/s?. Answer in units of m/s?.
- A uniform rod is set up so that it can rotate about an axis at perpendicular to one of its ends. The length and mass of the rod are 0.765 m and 1.27 kg respectively. A force of constant magnitude ?F acts on the rod at the end opposite the rotation axis. The direction of the force is perpendicular to both the rod's length and the rotation axis. Calculate the value of ?F that will accelerate the rod from rest to an angular speed of 6.21 rad/s in 9.91 syo-yo with an inner cylinder of r = 3.5 cm and outer radius of R = 6.50cm is at rest on a theta = 30 degree incline. Itis held in place by friction and the tension in the string that is wrapped around its inner cylinder, as shown in the figure. Assume that the positive x-direction points down the incline. Determine the friction force if the mass of the yo-yo is 420g.9
- = The figure shows particles 1 and 2, each of mass m, attached to the ends of a rigid massless rod of length L₁ + L2, with L₁ 1.0 m and L2 = 4.0 m. The rod is held horizontally on the fulcrum and then released. What are the magnitudes of the initial accelerations of (a) particle 1 and (b) particle 2? (a) Number (b) Number i 144 Units Units -Lg-While installing new spark plugs in your car, the manual specifies they be tightened to 74 Nm. If you can only apply a force to the wrench 21 cm from the plug, and only at an angle of 53 degrees, What magnitude force should you apply to the wrench?