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Q1. You have a mass of 59 kg and are on a 56-degree slope hanging on to a cord with a breaking strength of 220 newtons. What must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved from the fire?
Q2. A flight attendant pulls her 70.10 N flight bag a distance of 258 m along a level airport floor at a constant speed. The force she exerts is 36.30 N at an angle of 52.0° above the horizontal.
(a) Find out work she does on the flight bag.
(b) Find out work done by the force of friction on the flight bag.
(c) Find out coefficient of kinetic friction between the flight bag and the floor.
An electric motor rotating a workshop grinding wheel at a rate of 9.90 x 10^1 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 56° above the horizontal. The weight of the ladder is 35 pounds. A 77 lb boy climbs 6.0 ft up the ladder. What is the magnitude of the friction force exerted on the lad..
Resistance and potential difference in an electrical circuit.
Speedboat A negotiates a curve whose radius is 150 m. Speedboat B negotiates a curve whose radius is 190 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
A glider of mass 1.00 kg is allowed to oscillate under the influence of a spring of spring constant 25.6 N/m while on a frictionless, horizontal air track. At t = 0 s glider is released from rest at x = 5.00 cm. (At equilibrium, the glider is at x = ..
Show that the boundary conditions far away from the cylinder
Find out an acceleration of mass and tension in the string
What is the magnitude of the force on an electron that is in the region between the plates at a point accurately 2.52 mm from the positive plate
Two 18 cm diameter charged disks face each other, 25 cm apart. Both disks are charged to - 30 nC. What is the electric field strength at the midpoint between two disks.
A cube of ice is taken from the freezer at -8.7^circ C and placed in a 114 g aluminium calorimeter filled with 329 g of water at room temperature of 20.0 ^circ {rm C}. The final situation is observed to be all water at 15.0^circ C.
A professor's office door is 0.94 wide, 2.2 high, 4.0 thick; has the mass of 23, and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame. When the door is open and at rest, the door closer exerts a torque of 5..
The four tires of an automobile are inflated to a gauge pressure of 2.10E+5 Pa. Each tire has an area of 0.0267 m2 in contact with the ground. Find out the weight of the automobile.
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