9.43 A baseball is thrown by a standard air. The diameter of the be the drag force on the baseball.
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- An astronaut has a mass of 68 kg. What is the weight of the astronaut on Earth at sea level? What are the mass and the weight of the astronaut on the Moon, and on Mars? What is the ratio of the pressure exerted by the astronauts shoe on Earth to Mars?A cylindrical tank containing a fluid (sg = 0.75) is accelerated upward by a net force of 40 lb. The volume of the fluid is 1.60 cu. ft. If the depth of the fluid is 3 ft, determine the force acting on the bottom of the tank. 4 decimal places answersA 18kg box is pulled along a horizontal surface by a force F of 50N , which is applied at a 30 degree angle . We assume a coefficient of kinetic friction of 0.4. Draw the free body diagram for the box and calculate the acceleration and the magnitude of the upward force FN exerted by the table on the box .
- Water from a fire hose is directed horizontally against a wall at a rate of 500 g/s and a speed of 4.2 m/s. Calculate the force exerted on the wall, assuming the water’s horizontal momentum is reduced to zero.When a 644lb boat is moving at 10ft per sec, the motor conks out. how much farther will the boat glide, assuming its resistance to motion is 2 v lb where v is feet per seconds2. A man pushes the 60-lb box with a force F. The force is always directed downward 30 ° from the horizontal as shown, and its magnitude is increased until the box begins to slide. Determine the initial acceleration of the box if the coefficient of kinetic friction is uk = 0.8.
- 1. A block having a mass of 50 kg is subjected to a horizontal force that is causing it to have an acceleration of 1 m/s2. If the coefficient of friction between the block and the horizontal surface is 0.40, determine: a) the value of the horizontal force. b) Find the distance traveled after 10 seconds if it has an initial velocity of 5 m/s.The 50 kg crate shown in the figure rests on a horizontal surface for which thecoefficient of kinetic friction is ??=0.3 If the crate is subjected to a 400 Ntowing force as shown, determine the velocity of the crate in 3? starting fromrestA cylindrical tank containing a fluid (sg = 0.75) is accelerated upward by a net force of 40 lb. The volume of the fluid is 1.60 cu. ft. If the depth of the fluid is 3 ft, determine the force acting on the bottom of the tank.
- If F1=100 lb and F2=200 lb, determine the magnitude and coordinate direction angles of the resultantcouple moment.A 1 kg ball moving horizontally to the right at 12m/s strikes a 10kg block placed at rest at an inclined plane, which makes an angle of 25 degrees with the horizontal. The coefficient of restitution is 0.60 and the coefficient of kinetic friction between the block and the inclined surface is 0.40. What is the velocity of the block after impact? What is the velocity of the ball after impact?Water enters a large rigid tank steadily at a rate of V . = 0.5 m3/s, and exits through a large rectangular opening through which the velocity changes linearly in the vertical direction from 4 m/s to 5 m/s. Knowing that the tank is full, determine the magnitude of the velocity through the circular opening at the top whose diameter is D = 15 cm.