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1. A 1300 kg car moving at 5.0 m/s is stopped by the actions of its brakes. The work done by the cars brakes is joules.
2. The total energy of a 5.0 kg falling rock is 5000J. If its potential energy is 2055J, the kinetic energy of the rock is J.
3. If the kinetic energy of a 6.0 kg falling rock is 3160J, the rocks speed is m/s.
4. Assume an asteroid is in the shape of a sphere and has a mass of 900 kilograms. Determine the density (in grams per cubic centimeter) of this asteroid if its diameter is known to 0.8 meters.
The shaft is made of A-36 steel and has a diameter of . It is fixed at and the support at has a torsional stiffness of . If it is subjected to the gear torques shown, determine the absolute maximum shear stress in the shaft.
SAE-30 oil at 40-C fills the gap between the stationary plate and the 20-cm-diameter rotating plate shown in Fig. 7.15. Estimate the torque needed assuming a linear velocity profile if O ¼ 100 rad=s.
Use the work-energy theorem to calculate the frictional force F and write down the expression for the angular acceleration with frictional force calculated in terms of m, L, h, and g.
An electric eel generates electric currents through its highly specialized Hunter's organ, in which thousands of disk-shaped cellscalled electrocytes are lined up in series, very much in the sameway batteries are lined up inside a flashlight.
a projectile is fired with an initial speed of 64.8m/s at an angle of 44.3 degrees above th horizontal on a long flat firing range. determine the direction of the projectile
Calculate the magnitude of the induced emf in a 400-turn coil if the magnetic field inside the coil increases from 0T to 0.0200T (200g) over a time of 0.10 s
Block 1 of mass m1 slides from rest along a frictionless ramp from height h = 3 m and then collides with stationary block 2, which has mass m2 = 5m1.
What is the value of the static friction.
q1. a solid cylindrical disk has a radius of 0.14 m. it is mounted to an axle that is perpendicular to the circular end
A block takes 5s to slide down a frictionless incline. The block has a mass of 4.1kg and the angle of the ramp is 37 degrees. Assuming it was initially at rest, what will the blocks final velocity be when it reaches the bottom of the ramp?
A girl delivering newspapers covers her route by traveling 4.00 blocks west, 6.00 blocks north, and then 5.00 blocks east. (a) What is her resultant displacement?
A spring with constant k = 40.0 N/m is at the base a frictionless, 30.0 degrees inclined plane. A 0.50-kg block is pressed against the spring, compressing it 0.20 m from its equilibrium position. The block is then released. If the block is not att..
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