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A 21.0kg block at rest on a horizontal frictionless air track is connected to the wall via a spring. The equilibrium position of the mass is defined to be at . Somebody pushes the mass to the position x= 0.350m, then lets go. The mass undergoes simple harmonic motion with a period of 3.50s. What is the position of the mass 2.905s after the mass is released?
Consider the same mass and spring discussed in the previous problem. What is the magnitude of the maximum acceleration the mass undergoes during its motion?
In 2.0 minutes, a ski lift raises four skiers at a constant speed to a height of 140 m. What is the average power provided by the tension in the cable pulling the lift
Standing on the ground 2.6m from a building, you want to throw a package from your 1.5-m shoulder level to someone in a window 3.9m above the ground. At what speed should you throw the package
A 5.0-kg block of aluminum is heated from 20degrees celsius to 90 degrees celsius at atm. pressure. estimate the work done by the aluminum
The ratio of the number of turns in the primary to the number of turns in the secondary of a step-down transformer is 25:1. how much power is delivered to the secondary
Consider a balloon containing carbon dioxide molecules at room temperature (20degree Celsius) and atmospheric pressure. find the number of molecules in the balloon
how far from a 53.4 mm focal-length lens must an object be placed if its image is to be magnified 2.20 and be real?
We want to hang a thin hoop on a horizontal nail and have the hoop make one complete small-angle oscillation each 3.6 s. What must the hoop's radius be
A freely falling object requires 1.90 s to travel the last 22.0 m before it hits the ground. From what height above the ground did it fall? An attacker at the base of a castle wall 3.97 m high throws a rock straight up with speed 6.00 m/s at a height..
Calculate the rotational inertia of a meter stick, with mass 0.576 kg, about an axis perpendicular to the stick and located at the 29.9 cm mark
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.67 m and 1.05 m, respectively. The respective rotational speeds are 456 rev/min and 4,130 rev/min.
A -200 × microscope has an eyepiece whose focal length is 4.5 cm. If the distance between the lenses is 21 cm, find the focal length of the objective
Determine the stopping distances for an automobile with aninitial speed 90 km/h and human reaction tim of 1.0s for anaccerleration a=-4.0 and a=8.0
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