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Q. A 50-gram super ball traveling at 25m/s is bounced off a brick wall and rebounds at 22 m/s. A high speed camera records this event. If the ball is in contact with the wall for 3.5 ms, what is the average acceleration of the ball during this time interval?
Q. Two small insulating spheres with radius 5.00×10-2 m are separated by a large center-to-center distance of 0.450 m. One sphere is negatively charged, with net charge -1.85 nanoCoulombs , and the other sphere is positively charged, with net charge 3.15 nanocoulombs . The charge is uniformly distributed within the volume of each sphere.
What is the magnitude of the electric field midway between the spheres?
Assume that a 16.5 m/s wind is blowing across the roof of your house. The density of air is 1.29 kg/m3. Conclude the reduction in pressure (below atmospheric pressure of stationary air) that accompanies this wind.
calculate the force of kinetic energy acting on Tom. calculate the distance from the edge of the table where Tom hits the floor.
A 220 g air-track glider is attached to a spring. The glider is pushed in 12cm against the spring, and then released. A student with a stopwatch finds that 16 oscillations take 11.5.
Two people are carrying a uniform wooden board that is 3.00 m long and weighs 160 N. If one person applies an upward force equivalent to 60 N at one end, at what point does the other person lift . If the tangential acceleration of a yo-yo at the en..
What centripetal force does an 80-kg passenger experience when seated 12 m from the center of the Ferris wheel whose angular speed is 0.50 rad/s.
Calculate the energy density in the electric field. After the collision, the club head travels (in the same direction) at 46 m/s. Find the speed of the golf ball just after impact.
A projectile of mass 7 kg is fired with an initial speed of 193 m/s at an angle of 16? with the horizontal. At the top of its trajectory, projectile explodes into two fragments of masses 4 kg and 3 kg.
What will the force be between these charges. What should the banking angle of the curves be so that the force of the pavement on the tires of the car is in the normal direction.
From the shape of total energy vs. time plot, what can you conclude about the conservation of mechanical energy in your mass and spring system.
A little cat, Bella, walks in a straight line, which we shall call the x axis, with positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function..
What is the tangential acceleration of a bug on the rim of an 11.00 in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 79.03 rev/min in 3.60 s? One second after the bug starts from rest, what is its centripetal accel..
What total impulse was imparted by these forces. Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.0 cm-3, and their speed is 702 km/s. Find the current density of these protons.
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