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The gravitational force exerted on a baseball is 2.11 N down. A pitcher throws the ball horizontally with velocity 13.5 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 160 ms. The ball starts from rest. (a) Through what distance does it move before its release? (b) What are the magnitude and direction of the force the pitcher exerts on the ball?
A 100 percent efficient electric motor is lifting a 15N weight at 25cm/s. If the motor is connected to a 7V battery, how much current does it draw.
Tarzan swings on a 30.0?m?long vine initially inclined at an angle of 370 with the vertical. What is his speed at the bottom of the swings if he starts from rest
A piece of iron of volume 5.13 x 10^(-4) m³ is supported by a string while submerged in water. What is the tension in the string
A 87 g arrow is fired from a bow whose string exerts an average force of 105 N on the arrow over a distance of 76 cm. Illustrate what is the speed of the arrow as it leaves the bow?
a competitive mini-golf player notices an opponents ball situated 50cm in front of a wallcontaining two tunnels. one
what are the ax and by components of the vector that must be added to the following three vectors so that the sum of
A tungsten wire has a radius of 0.086 mm and is heated from 20.0 to 1422 oC. The temperature coefficient of resistivity is ? = 4.5, How long is the wire
Find out the rate of the wheel's rotation in revolutions per minute that will produce this effect.
A laser light has a wavelength of 670 nanometers and the separation between the two first order diffraction minima is 11 cm. Calculate the slit width and slit separation
A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is 2.10×104 m/s2, what was the initial velocity of the ball
A 3.7 kg block of copper at a temperature of 86°C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg. How much ice was in the bucket before the copper block was placed in it
A 10-kg box is stationary on the ground and pushed by a downward force of 30 N. Calculate the supporting normal force acted on the box from the ground
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