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Just after opening a parachute of negligible mass, a parachutist of mass 82.5 kg experiences an instantaneous upward acceleration of 1.15 m/s2. Find the force of the air on the parachute.
Objects A and B are both positively charged. Both have a mass of 400g , but A has twice the charge of B. When A and B are placed 25cm apart, B experiences an electric force of 0.54N . What is the charge on A? If the objects are released, what is t..
A 220 g block hangs from a spring with spring constant 12 N/m. At t=0;{rm s} the block is 31cm below the equilibrium point and moving upward with a speed of 89.0 cm/s. What is the block's distance from equilibrium while the speed is 30 cm/s.
Asteroid 433 Eros is one of the largest near-Earth asteroids. For purposes of this problem,assume it is spherical. What is the mass of Eros
What is the CD's moment of inertia for rotation about a perpendicular axis by the edge of the disk.
On a banked race track, the smallest circular path on which cars can move has a radius of 120 m, while the largest has a radius 155 m, Find the smallest speed at which cars can move on this track without relying on friction
In the system shown in the figure below, a horizontal force F with arrowx acts on an object of mass m2 = 8.60 kg. The horizontal surface is frictionless. Consider the acceleration of the sliding object as a function of Fx.
A small bird's wings can undergo a maximum displacement amplitude of 5.9 cm. what is the oscillation frequency of the wing tips
An X-ray photon with a wavelength of 0.260 nm scatters from a free electron at rest. Find the final momentum of the photon
A railroad car of mass 2.52 104 kg is moving with a speed of 4.06 m/s. It collides and couples with three other coupled railroad cars, How much mechanical energy is lost in the collision
question1a bus travels 330 km south along a straight path with an average velocity of 84 kmh to the south. the bus
A thin spherical shell has a radius of 4 m and a mass of 225 kg, and its center is located at the origin of a coordinate system. find the gravitational force of attraction between the two shells
Two divers jump from a 5-m platform. One jumps upward at 1.90m/s , and the second steps off the platform as the first passes it on the way down. By how much does the first diver hit the water first (seconds)
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