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- The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016, determine the force F required to advance the bar at a constant speed.Plot the earths gravitational acceleration g(m/s2) against the height h (km) above the surface of the earth.A block is being pushed on a flat surface of magnitude 45N. The force of friction on the brick is 13 N. that mass of the block is 11kg. A draw a free body diagram B what is the net force acting on the block C what is the acceleration of the block?
- A 4-kg block rests on a smooth surface and is acted upon by force F, as shown in the figure. What is the value of the force F if the block accelerates at 15 m/s2A small 0.18 kg metal ball is tied to a very light (essentially massless) string that is 0.60 m long. The string is attached to the ceiling so as to form a pendulum. The pendulum is set into motion by releasing it from rest at an angle of 50 degrees with the vertical. I solved that the speed of the ball when it reaches the bottom of the arc is 2.0 m/s and the tension of the string is 3.0 N What is the centripetal acceleration of the ball at this point?Mason is is trying to keep a door open using a door stopper. That door is solid, and it has a mass of 18.3kg. The door closer is connected 26.2cm away from the hinge, and pulls with a force of 123N. The door stopper provides a static friction force of 13.2N, and a kinetic friction force off 11.8N. Find the angular acceleration (as a vector) of the door.
- A 2-kg block on a frictionless inclined plane at 40° has a cord attached to a pulley of mass 1 kg and radius 20 cm (see the following figure). (a) What is the acceleration of the block down the plane? (b) What is the work done by the gravitational force to move the block 50 cm?Specifically a dynamics problem: A sphere is fired downward into a medium with an initial speed of 27 m/s. If it experiences a deceleration of a = -6t m/s2, determine the distance traveled before it stops.A 40.0-N crate starting at rest slides down a rough 6.00-m-long ramp, inclined at 30.0 degrees with the horizontal. The magnitude of the force of friction between the crate and the ramp is 6.0 N. What is the speed of the crate at the bottom of the incline?
- A truck weighing 5 kips is traveling with a constant velocity of 50 mph when brakes are applied causing a braking force of 2 kips. If the truck is going up a road inclined at 100, Proove that the distance traveled before it stops is 176.17 feet.A disk rotating with constant acceleration of 0.005 revolutions / s2 And the movement starts from rest. What is the angle velocity after one minute? How many turns makes the same disc in point number one after one minute. If an external force does not affect the body, what does that mean? And if the body is in free fall, is its speed constant or variable, what is its acceleration equal, and how can the friction be reduced between the contact surfacesA block of mass M1 resting on an inclined plane is connected by a string and pulleys to another block of mass M2 as shown in Fig. Find the tension in the string and acceleration of the blocks. Assume the coefficient of friction between the blocks M1 and the plane to be 0.2. M1=1500N , M2=1000N . Angle of inclined glane = 45 degrees