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Q. A 0.35kg mass suspended from a spring moves with simple harmonic motion. At the instant mass is displaced from equilibrium by -0.105 m, what is its acceleration? (The spring constant is 11.8N/m)
Q. A 5500 kg helicopter accelerates upward at 0.50 m/s^2 while lifting a 1200 kg car.
A. what is the lift force exerted on the air by rotors?
B. what is the tension in cable (ignore its mass) that connects the car to the helicopter?
A space station, in the form of a wheel 100m in diameter, rotates to supply an "artificial gravity" of 3.7m/s2 for persons who walk around on inner wall of the outer rim. Find out the rate of rotation of the wheel (in revolutions per minute) that ..
A projectile is shot from the edge of a cliff h = 105 m above ground level with an initial speed of v0 = 135 m/s at an angle of 37.0Â ° with the horizontal.
A 5g bullet leaves the muzzle of a rifle with a speed of 320 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.81 m long barrel of rifle.
Radius=10m Vt=12.3 If at point A the track exerts a force on the car that is 2.92 × 10^4 N greater than the car's weight, what is the mass of the car.
Consider a too-small space station that consists of a 2.7m radius rotating sphere. A man standing inside is 1.9m tall and his feet are at 1g. What is the acceleration of his head.
Since the vehicles stick together after the collision and take the direction of the large truck (greater momentum), I guessed that the small car would have a greater change in kinetic energy.
An insulated Thermos contains 138cm3 of hot coffee at 95 °C. You put a 12g ice cube at its melting point to cool the coffee. By how numerous degrees has your coffee cooled once the ice has melted and equilibrium is reached.
What is the minimum coefficient of friction between tires and road that would allow cars to take the turn without sliding off the road.
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling the vertical distance 1.25 m from the end of the track.
The magnetic field perpendicular to a single 14cm diameter circular loop of copper wire decreases uniformly from 0.750 T to zero. If the wire is 2.25 mm in diameter, how much charge moves past a point in the coil throughout this operation.
A 4.80 long, 600 steel beams extends horizontally from point where it has been bolted to the framework of a new building under construction. A 75 construction worker stands at the far end of beam.
A bartender slides a beer mug at 1.30 m/s towards a customer at the end of a frictionless bar that is 2.0m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar.
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