A particle of mass 4.6 kg starts at A with initial velocity 3.6 m/s for H=9 m and h =2 m, radius of curvature at B is 5.7 m and at C is 24 m.

For a particle of mass m moving under the force of F = a(xi + yj + 2zk). Here a is a constant. (a) Is the linear momentum vector conserved? (b) Is a particular component (x, y, or z) of the linear momentum conserved? (c) Is the angular momentum vector conserved? (d) Is a particular component (x, y, or z) of the angular momentum conserved? (e) Is the energy conserved?

4) A toy wood block of mass m1= 3.25 kg is pushed by hand to compress a spring with a spring constant k= 550 N/m a distance As = 25cm. The toy block is released by the hand and the spring launches the toy block across a frictionless surface toward a more massive wood block ofimass m2= 5.0 kg. The 3.5 kg wood block is moving with an unkown velocity right before it collides with the more massive wood block which is at rest. After the collision, the 5.0 kg block is moving to the right with a velocity of 3 m/s. The more massive 5.0 kg block encounters a long rough section of surface having a coefficient of kinetic uk=0.22 and is eventually brought to rest. a) Find the velocity of the 3.25 kg block just before the collision. b) Find the velocity of the 3.25 kg block just after the collision c) What is the system's energy just before the collision? d) What is the system's energy just after the collision? e) Is this collision, elastic, completely inelastic, or inelastic? f) What is the…

A happy kangaroo leaps vertically upward at a time t = 0. At time t = 0.50 s the kangaroo is at a height of 2.0 meters above the ground. What is the speed and direction of motion of the kangaroo at this time (at t = 0.50 s)? Neglect air friction. 4.9 m/s downward 1.55 m/s upward O none of these 2.45 m/s downward 4.9 m/s upward 2.45 m/s upward