Use the worked example above to help you solve this problem. A 1.19 103-kg elevator car...
Use the worked example above to help you solve this problem. A 1.19 103-kg elevator car carries a maximum load of 7.40 102 kg. A constant friction force of 4.07 103 N retards its motion upward, as shown in the figure. What minimum power, in kilowatts and horsepower, must the motor deliver to lift the fully loaded elevator at a constant speed of 3.00 m/s?
P = kW
P = hp
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Use the worked example above to help you solve this problem. A
1.19 103-kg elevator car...
_10. You and your BFF (combined mass of 200 kg) are taking an elevator to your...
_10. You and your BFF (combined mass of 200 kg) are taking an elevator to your physics lecture. The elevator car has a mass of 1,600 kg. A constant friction force of 4,000 N retards the elevator's motion. How much power must the motor deliver to lift the elevator car and its passengers at a constant speed of 3.00 m/s? a. 6.49 x 104 W = 200kn P U b. 1.24 x 10 W c. 5.33 x 10 W d....
One kind of elevator has the elevator car hanging from a cable, which then passes over...
One kind of elevator has the elevator car hanging from a cable,
which then passes over a pulley and connects to a counterweight, as
shown in (Figure 1). The mass of a fully-loaded elevator (that is,
the elevator and all its passengers) is 1850 kg , the mass of the
counterweight is 1500 kg , and the pulley has a radius of 0.4 m
and a mass of 400 kg . A motor drives the motion of the elevator by...
Use the worked example above to help you solve this problem. A 1.28 x 103 kg...
Use the worked example above to help you solve this problem. A 1.28 x 103 kg car is constructed on frame supported by four springs. Each spring has a spring constant riding in the car have a combined mass of 1.60 x 102 kg, find the frequency of is driven over a pothole in the road. Find also the period and the angular frequency. Assume the weight is evenly distributed. of 2.07 x 10 N/m. If two people vibration of...
PRACTICE IT Use the worked example above to help you solve this problem. In a car...
PRACTICE IT Use the worked example above to help you solve this problem. In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r = 4.55 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius 13.7 cm. (a) What force must the compressed air exert on the small piston in order to lift a car weighing 13,300 N?...
Use the worked example above to help you solve this problem. In a crash test, a...
Use the worked example above to help you solve this problem. In a crash test, a car of mass 1.44 103 kg collides with a wall and rebounds as shown in the figure. The initial and final velocities of the car are vi = -15.2 m/s and vf = 2.11 m/s, respectively. If the collision lasts for 0.153 s, find the following. (a) the impulse delivered to the car due to the collision kg · m/s (b) the size of...
PRACTICE IT Use the worked example above to help you solve this problem. Charge q1 7.40...
PRACTICE IT Use the worked example above to help you solve this problem. Charge q1 7.40 C is at the origin, and charge q 2--4.9。pC is on the x-axis, 0.300 m from the origin (see figure). (a) Find the magnitude and direction of the electric field at point P, which has coordinates (0, 0.400) m. magnitude directiorn N/C o counterclockwise from the +x-axis (b) Find the force on a charge of 2.00 x 108 C placed at P EXERCISE HINTS:...
Use the worked example above to help you solve this problem. A car traveling at a...
Use the worked example above to help you solve this problem. A car traveling at a constant speed of 27.3m/s passes a trooper hidden behind a billboard, as in the figure. One second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.98 m/s2. (a) How long does it take the trooper to overtake the speeding car? s (b) How fast is the trooper going at that time? m/s
PRACTICE IT Use the worked example above to help you solve this problem. Consider the figure...
PRACTICE IT Use the worked example above to help you solve this problem. Consider the figure below, where = 5.12 kg, m2 = 2.58 kg, m3 = 4.05 kg, d, = 1.37 m. Treat the objects as point 0.423 m, and d2 m1 particles. т, 1.00 m т, т, т, m2 d, 0.500m m3 Б (a) Three particles are located in a coordinate system shown in Figure (a). Find the center of gravity (b) How does the answer change if...
PRACTICE IT Use the worked example above to help you solve this problem. An airplane has...
PRACTICE IT
Use the worked example above to help you solve this problem. An
airplane has wings, each with area 4.05 m2, designed so
that air flows over the top of the wing at 249 m/s and underneath
the wing at 226 m/s. Find the mass of the airplane such that the
lift on the plane will support its weight, assuming the force from
the pressure difference across the wings is directed straight
upwards.
Your response differs from the correct...
PRACTICE IT Use the worked example above to help you solve this problem. A uniform ladder...
PRACTICE IT Use the worked example above to help you solve this problem. A uniform ladder I 10.0 m long and weighing W52.9 N rests against a smooth vertical wall. If the ladder is just on the verge of slipping when it makes a 0 47.00 angle with the ground, find the coefficient of static friction between the ladder and ground. 0.536 X Your response differs from the correct answer by more than 10 %. Double check your calculations. EXERCISE...
_10. You and your BFF (combined mass of 200 kg) are taking an elevator to your physics lecture. The elevator car has a mass of 1,600 kg. A constant friction force of 4,000 N retards the elevator's motion. How much power must the motor deliver to lift the elevator car and its passengers at a constant speed of 3.00 m/s? a. 6.49 x 104 W = 200kn P U b. 1.24 x 10 W c. 5.33 x 10 W d....
One kind of elevator has the elevator car hanging from a cable,
which then passes over a pulley and connects to a counterweight, as
shown in (Figure 1). The mass of a fully-loaded elevator (that is,
the elevator and all its passengers) is 1850 kg , the mass of the
counterweight is 1500 kg , and the pulley has a radius of 0.4 m
and a mass of 400 kg . A motor drives the motion of the elevator by...
Use the worked example above to help you solve this problem. A 1.28 x 103 kg car is constructed on frame supported by four springs. Each spring has a spring constant riding in the car have a combined mass of 1.60 x 102 kg, find the frequency of is driven over a pothole in the road. Find also the period and the angular frequency. Assume the weight is evenly distributed. of 2.07 x 10 N/m. If two people vibration of...
PRACTICE IT Use the worked example above to help you solve this problem. In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r = 4.55 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius 13.7 cm. (a) What force must the compressed air exert on the small piston in order to lift a car weighing 13,300 N?...
PRACTICE IT Use the worked example above to help you solve this problem. Charge q1 7.40 C is at the origin, and charge q 2--4.9。pC is on the x-axis, 0.300 m from the origin (see figure). (a) Find the magnitude and direction of the electric field at point P, which has coordinates (0, 0.400) m. magnitude directiorn N/C o counterclockwise from the +x-axis (b) Find the force on a charge of 2.00 x 108 C placed at P EXERCISE HINTS:...
PRACTICE IT Use the worked example above to help you solve this problem. Consider the figure below, where = 5.12 kg, m2 = 2.58 kg, m3 = 4.05 kg, d, = 1.37 m. Treat the objects as point 0.423 m, and d2 m1 particles. т, 1.00 m т, т, т, m2 d, 0.500m m3 Б (a) Three particles are located in a coordinate system shown in Figure (a). Find the center of gravity (b) How does the answer change if...
PRACTICE IT
Use the worked example above to help you solve this problem. An
airplane has wings, each with area 4.05 m2, designed so
that air flows over the top of the wing at 249 m/s and underneath
the wing at 226 m/s. Find the mass of the airplane such that the
lift on the plane will support its weight, assuming the force from
the pressure difference across the wings is directed straight
upwards.
Your response differs from the correct...
PRACTICE IT Use the worked example above to help you solve this problem. A uniform ladder I 10.0 m long and weighing W52.9 N rests against a smooth vertical wall. If the ladder is just on the verge of slipping when it makes a 0 47.00 angle with the ground, find the coefficient of static friction between the ladder and ground. 0.536 X Your response differs from the correct answer by more than 10 %. Double check your calculations. EXERCISE...
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