4. The 100-kg crate is subjected to the forces shown. If it is originally at rest, determine the distance it slides in order to attain a speed of v= 6 m/s. The coefficient of kinetic friction between the crate and the surface is Hk = 0.2. 500 N 400 N 30° 45°
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- 1. A box is being pulled up a 40° incline by a 7.0 kg block suspended from a frictionless, massless pulley. The box does not start at the very bottom of the incline. The block is suspended 2.0 m above the ground. The coefficient of kinetic friction between the box and the incline is 0.40. The block is released from rest. At the moment the block hits the ground, the box is traveling at 2.0 m/s up the incline. What is the mass of the box?3. Suppose a box enters a region of frictional floors, as seen in Fig. 3. x = 0 1 μ1 H₂ μ3 μ4 H5 μ6 d The box with mass m = 2 kg enters the region with initial speed vo = 10 m/s. Each of the frictional patches has a length of d = (10/19.62) m. The n-th frictional patch has a coefficient of kinetic friction given by un. (a) What is the initial kinetic energy of the box? hope (b) f 0.3 for all , how far goes the bleek travel before stopping? Find the thermal energy of the system at the end of each patch trayersed Do the same if un (d) Do the same if µn = (10/11)". (Does this one ever stop?) m VoA truck is traveling at 11.8 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 13° with respect to the horizontal. The coefficient of kinetic friction between the tires and the road is 0.956. How far does the truck skid before coming to a stop? Number Units
- Forces: A 7.60×103 kg transport truck is approaching a 20.0° icy hill that has a bridge at the top that is out of service. The driver immediately slams on the brakes and begins to skid up the hill. The coefficient of kinetic friction between the tires and the hill is 0.350. If there is only 131 m from the bottom of the hill to the bridge what maximum speed can the truck initially be going and still avoid an accident?A crate with mass m = 20 kg is being pushed to the right by a force of magnitude F = 80 N The crate is placed on a rough horizontal coefficient of kinetic friction surface with a HK= 0.2 Take g = 10 m/s² The acceleration of the crate is: 3.8 m/s^2 O 2 m/s^2 O 6 m/s^2 4 m/s^2