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You throw a ball vertically upward so that it leaves the ground with velocity 2.49 m/s
(a) What is its velocity when it reaches its maximum altitude?
(b) What is its acceleration at this point?
(c) What is the velocity with which it returns to ground level?
(d) What is its acceleration at this point?
To keep her dog from running away while she talks to a friend, Susan pulls gently on the dog's leash with a constant force given by F = (2.1 N ) ^x+ (1.5 N )^y, How much work does she do on the dog
A magnetic field has a magnitude of 0.0014 T, and an electric field has a magnitude of 4.2 × 103 N/C. compute the magnitude of the net force that acts on the charge
Two forces are applied to a 5.0 kg crate; one is 6.0 N to the north, compute The magnitude of the acceleration of the crate
he lower block in the figure is pulled on by a rope with a tension force of 20 N. The coefficient of kinetic friction between the lower block & the surface is 0.30. The coefficient of kinetic friction between the lower block & the upper block is a..
A parallel-plate air-filled capacitor having area 50 cm2 and plate spacing 1.3 mm is charged to a potential difference of 710 V, find the energy density between the plates
A 1380-kg racecar is driving around a circular track of radius 157 m, What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
An athlete training for an event does 6.53 104 J of work during a workout and gives off 6.17 105 J of heat, Determine the magnitude of the change in internal energy of the athlete
A calorimeter contains 2000 grams of water at 0oc. a jet of stream at 100oc is passed through the water. What is the temperature of the water when 100 grams of steam have condensed in it.
A spacecraft is in orbit around a planet. The radius of the orbit is 3.2 times the radius of the planet, What is the period of the spacecraft's orbit
A car with a mass of 980 kg is initially traveling east toward an intersection with a speed of vc = 20.8 m/s, Determine the initial speed of the truck and the final speed of the wreckage
An alpha particle (m = 6.7 x 10^-27kg, q = +3.2 x 10^-19C) has a speed of 30km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out the electric potential difference.
A blue puck with a mass of 3.60×10?2kg , sliding with a speed of 0.180m/s on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass m, Find the mass m of the red puck
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