A block of mass 25.0 kg slides down a frictionless surface inclined at 30°. To ensure that the block does not accelerate, what is the smallest force that you must exert on it and what is its direction?
Answer to relevant Questions(a) An Olympic skier coasts down a slope with an angle of inclination of 37o. Neglecting friction, there is (are) (1), one, (2) two, (3) three force(s) acting on the skier. (b) What is the acceleration of the skier? (c) If ...A physicist’s car has a small lead weight suspended from a string attached to the interior ceiling. Starting from rest, after a fraction of a second the car accelerates at a steady rate for about 10 s. During that time, ...The Atwood machine consists of two masses suspended from a fixed pulley, as shown in Fig. 4.42. It is named after the British scientist George Atwood (1746– 1807), who used it to study motion and to mea-sure the value of ...A 20-kg box sits on a rough horizontal surface. When a horizontal force of 120 N is applied, the object accelerates at 1.0 m/s2. (a) If the applied force is doubled, the acceleration will (1) increase, but less than double; ...A block is projected with a speed of 2.5 m/s on a horizontal surface. If the block comes to rest in 1.5 m, what is the coefficient of kinetic friction between the block and the surface?
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