98. •A 20-g object is placed against the free end of a (k equal to 25 N/m) that is compressed 10 cm (Figure 6-42). Once released, the object slides 1.25 m across the tabletop and eventually lands 1.60 m from the edge of the table on the floor, as shown. Is there friction between the object and the tabletop? If there is, what is the coef- ficient of kinetic friction? The sliding distance on the tabletop includes the 10-cm compression of the spring and the tabletop is 1.00 m above the floor level. spring 1.25 m 10000 1.00 m -1.60 m-

98. •A 20-g object is placed against the free end of a (k equal to 25 N/m) that is compressed 10 cm (Figure 6-42). Once released, the object slides 1.25 m across the tabletop and eventually lands 1.60 m from the edge of the table on the floor, as shown. Is there friction between the object and the tabletop? If there is, what is the coef- ficient of kinetic friction? The sliding distance on the tabletop includes the 10-cm compression of the spring and the tabletop is 1.00 m above the floor level. spring 1.25 m 10000 1.00 m -1.60 m-

Similar questions

6. Conceptual question: The block below slides with constant velocity under the action of an applied force as shown. Given that there is friction, which statement is true? (a) W = N, Fapl = |Friel: (b) N > W, JFappl = |Ffricl- (c) N > W, Fepp| > |Ffricl- (d) N |Ffricl- аpp аpp аpp (f) None of the above. Fapp
An Atwood’s machine is set up by suspending two blocks connected by a string of negligible mass over a pulley, as shown above. The blocks are initially held at rest and then released at time t0=0 s. The speed of the 3 kg block at time t1=2.0 s is most nearly: A) 2.0 m/s B) 4.0 m/s C) 7.0 m/s D) 10.0 m/s
Leg mass = 20 Kg, Leg CG to Hip = 35 cm and Sling to Hip = 95cm. Find m. • Hip joint CG Upload Choose a File L
Rock Climber Sliding Down a Smooth Slab 9.6 m Hk =0.72 %3D 56° Consider the rock climber climbing on a smooth slab, as shown above: the coefficient of kinetic friction between the climber's rock shoes and the rock is 0.72 the belayer cannot see the climber who is out of sight beyond the edge of the slab the belayer cannot hear the climber because the wind is blowing very hard The climber loses his footing and slides down the slab from rest. How long after the climber loses his footing does the belayer realize she needs to catch the climber's fall? [answer: about 2.1 s] FNET = ma W = mg g = 9.81 m/s? Ax = vot + ½ at?
Professional Application - During a visit to the International Space Station, an astronaut was positioned motionless in the center of the station, out of reach of any solid object on which he could exert a force. Suggest a method by which he could move himself away from this position, and explain the physics involved.
1. Find the least value of P required to cause the system of blocks shown in Figure P-511 to "just begin" moving to the left. The coefficient of friction under each block is 30 kN 0.20 and a =11. 10 kN Halino.com 30 Figure P-511
• A 6kg block rests on a smooth table. It is connected by a string of negligible mass to a block hanging over the end of the table. Assuming motion is downwards, Find i. The acceleration of each block(2.5m/s²) ii. The tension in the connecting string(14.7N) iii. The position of mass of A after 0.4 second iv. The velocity of mass A at 0.4 seconds (0.98m/s)
7) The mass m = 3 kg is hanging from a thread as it is shown in the figure. It is let to fall from a height h = 1.28 m. When it passes through its origin (vertical position), it collides against a block of mass M = 12 kg initially at rest. The restitution coefficient is 0.75. The blocks has a friction coefficient of 0.2 with the ground. Estimate the distance covered by the block after collision. Ans: 0.784 m.
14- The friction-neutral inclined plane has a height of 20 m. If an object thrown from the highest point of the inclined plane with a velocity of 10 m/s passes through the lowest point of the inclined plane with the velocity Vs, how many m/s is Vs? A) 10,73 B) 25,76 C) 22,2 D) 15,7 E) 28,14
7) A 5-kg body A is released from rest on a frictionless circular surface. The body then moves on a horizon- tal surface CD whose coefficient of friction with the body is 0.2. A spring having a spring constant K = 900 N/m is positioned at C shown in the diagram. How much will the spring compress? K -10 m- 7 m 8) For the system in Question 7, what is the velocity of block A each time it passes point D? 9) For the pendulum in Question 7, what is the maximum normal acceleration of the block?
5:12 AM Wed Apr 27 * 100% Apr 27, 2UZZ at 5.1TI AM Cord Platform Platform -Cord D Figure 1. Initial State Figure 2. Final State An amusement park ride is designed such that one end of an elastic cord is fixed to a platform that is a distance D above the ground. The other end of the cord is attached to a person of mass M. The cord has an unstretched length of L. To begin the ride, the person jumps up from the platform with an initial speed, vo , as shown in Figure 1. As the person falls, the elastic cord stretches and can be modeled much like a spring of negligible mass. After the cord can no longer be stretched, the person is a distance H above the ground and is no longer in motion, as shown in Figure 2. The reference position for zero gravitational potential energy of the person-cord-Earth system is a distance H above the ground. All frictional forces are considered to be negligible. ? (a) The initial state of the system is shown in Figure 1, and the final state of the system is shown…