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A BB gun shoots pellets so that their velocity is given by v = (-5.00 107) t 2 + (2.80 105) t, where v is in meters per second and t is in seconds. The acceleration of the pellet just as it leaves the barrel is zero.
(A) Determine the length of time the pellet is accelerated.
(B) Find the speed at which the pellet leaves the barrel.
(C) What is the length of the barrel?
Find the recoil speed of the rifle. A 650-N force acts in a northwesterly direction. A second 650-N force must be exerted in what direction so that the reultant of the two forces points westward? Illustrate your answer with a vector diagram.
A baseball player hits a double and ends up on second base. A baseball "diamond" is a square, each side of length 27.4 m, with home plate and the three bases on the four corners. What is the magnitude of the player's displacement?
A 1300-kg car moving on a horizontal surface has speed v = 55km/h when it strikes a horizontal coiled spring, What is the spring stiffness constant of the spring
A ray of light is incident on glass-air interface at the critical angle of 41 deg., what is the refracted angle, What is the strength of a lens which forms an image 24 cm from the lens when the object is 40 cm away
If the ball is released from rest at a height of 0.78m above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track? suppose the ball is a solid sphere of radius 2.3cm and mass 0.14k..
A bag of blood with a density of 1050 kg/m^3 is raised about 1.00m higher than the level of a patient's arm. How much greater is blood pressure at the patient's arm than it would be if the bag were at the same height as the arm.
A diver of weight 780 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m
how much time passes before the police car overtakes the speeder after the speeder passes (assumed moving at constant speed).
Explain how long is the bullet in the target? What average force does the bullet exert on the target? What is the target's speed just after the bullet emerges?
A particle of mass 0.350 kg is attached to the 100-cm mark of a meterstick of mass 0.200 kg. Calculate the angular momentum of the system when the stick is pivoted about an axis perpendicular to the table through the 50.0-cm mark
A uniform rope of mass m and length L is hanging straight down from the ceiling. A small-amplitude transverse wave is sent up the rope from the bottom end. Derive an expression that gives the speed v of the wave on the rope in terms of the distanc..
A boat moves through the water of a river at 9 m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.9 m/s, how long does it take the boat to make a round trip consisting of a 225 m displacement d..
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