in 0.40 Hk 0.25 20° At a certain instant, the m 30 kg crate has a velocity of vo 10 m/s up the 20° incline Calculate (a) the time t required for the crate to come to rest t Number (b) the correspondi...
1. A bicycle slows down uniformly from an initial velocity vi = 8.70 m/s to rest over a distance of 125 m. Each wheel has an overall diameter of 690 cm. You can assume that the wheels roll without slipping. (a) Calculate the angular speed of the wheels at the initial instant (t = 0). (b) Calculate the total number of revolutions each wheel rotates before coming to rest. (c) Calculate the angular acceleration of the wheel (d) Calculate the time it takes to...
1. (30 points) A 2-kg block A is pushed up against a spring compressing it a distance r-0.1 m (i.e., the spring is unattached to the block). The block is then released from rest and slides down the 20° incline u it strikes a 1-kg sphere B that is suspended from a 1-m inextensible rope. The spring constant 800 N/m, the coefficient of friction between A and the ground i length of the spring d-1.5, and the coefficient of restitution...
Two objects, A with mass mA=0.25 kg and B with mass mB=1.25 kg, are held at rest on a spring is released, A has a kinetic energy of 22 J and B has a kinetic energy of A) 110 J g is compressed between them. Immediately after the B) 5.5J C) 11 J D) 4.4 J E) 19.4 J 18. A certain wheel has a rotational inertia of 12 kg m2. As it turns through 5.0 rev its angular velocity...
A particle slides along a straight wire so that a--k/v where a is the acceleration, v is the velocity and k-20 m3/s. The particle stars at X 0, t-0, with a speed vo 10 m/s. 2. When the particle is at x = 4 m, the speed v is most nearly A. 2.49 m/s B. 3.46 m/s C. 5.29 m/s D. 6.93 m/s E. 7.50 m/s F. 8.62 m/s G. 8.88 m/s H. 9.13 m/s I 9.81 m/s J. 10.00...
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3 kg vertically cing is 10 kg g is used to frictionless maximum these ag is most 11. Three blocks, A, B, and C. of masses 1, 2, and 3 kg, respectively, are initially at rest on a frictionless surface as indicated in the figure above. What force has to be applied on block C 5= 200 mis? to accelerate the three blocks at 2 m/s? (A) 0.33 N (2) +22) 4362) 16 V=20mis (B) 1.5...