Physics Force & Laws Of Motion Level: Misc Level
A 5,000- kg motorboat sits still on a frictionless lake.There is no wind to push against the boat. The captain starts the motor and runs it steadily for 12.0 seconds in direction striaght forward and then shuts the motor off.The boat has attained a velocity of 6.0 m/sec striaght forward. what is the average force supplied by the motor?
Physics Force & Laws Of Motion Level: Misc Level
A 50- lb block rests on a horizontal surface. A horizontal force of 10 lb must be applied to the block to set it into motion. Find the coefficient of static friction.
Physics Force & Laws Of Motion Level: Misc Level
Questions: A fugitive tries to hop on a freight train traveling at a constant speed of 6.0 m/s. just as an empty box car passes him, the fugitive starts from rest and accelerates at a = 4. 0 m/s^2 to his maximum speed of 8. 0 m/s. (a) How long does it take him to catch up to the empty box car? (b)What is the distance traveled to reach the box car?
Physics Force & Laws Of Motion Level: Misc Level
An airplane flies on a level path. There is a pressure difference of 520 Pa between the lower and upper surfaces of the wings.The area of each wing surface is about 170m2. The air moves below the wings at a speed of 80. 1 m/s. a) Estimate the weight of the plane. (b)Estimate the air speed above the wings.
Physics Force & Laws Of Motion Level: Misc Level
A block of mass 5.00 kg rests on a horizontal surface where the coefficient of kinetic friction between the two is 0.200. A string attached to the block is pulled horizontally, resulting in 2.00 m/s^2 acceleration by the block.Find the tension in the string. (g=9.80 m/s^2)
Physics Force & Laws Of Motion Level: Misc Level
A 9.0 kg hanging weight is connected by a string over a pulley to a 5.0 kg block sliding on a flat table. If the coefficient of sliding friction is 0.20,find the tension in the string.
Physics Force & Laws Of Motion Level: Misc Level
A 70.0 kg man jumps 1.00 m down onto a concrete walkway. His downward motion stops in 0.0200 seconds. If he forgets to bend his knee, what force is transmitted to his leg bones?
Physics Force & Laws Of Motion Level: University
Resultant ForceWhile a 300 kg airplane is in horizontal filight its engines provide 9000N of force while an 8000N force opposes the motion of the plane. What is the approximate acceleration of the plane?
Physics Force & Laws Of Motion Level: University
VectorA plane has a vertical speed of 20m/s and a horizontal speed of 100m/s. What is the total speed of the plane?
Physics Force & Laws Of Motion Level: University
Centrifugal ForceA coin placed on a turntable rotating at 36.8 rev/min will stay there if its center is placed no further than 9.8cm from the axis of rotation. What is the maximum distance the center of the coin can be placed from the axis if the turntable rotates at 45.5 rev/min?
Part:2 What is the coefficient of friction between the coin and the turntable?
Physics Force & Laws Of Motion Level: University
Centrifugal ForceA coin placed on a turntable rotating at 36.8 rev/min will stay there if its center is placed no further than 9.8cm from the axis of rotation. What is the maximum distance the center of the coin can be placed from the axis if the turntable rotates at 45.5 rev/min?
Part:2 What is the coefficient of friction between the coin and the turntable?
Physics Force & Laws Of Motion Level: University
Projectile MotionA ball player hits a home run the baseball just clears the wall 21.0m high located 130.0m from home plate. The ball is hit at an angle of 35.0 degrees to the horizontal and air resistance is negligible. Assume the ball is hit at a height of 1.0 m above the ground
(a) What is the initial speed of the ball?
(b) How much time does it take for the ball to reach the wall?
(c) Find the velocity components and the speed of the when it reaches the wall
Physics Force & Laws Of Motion Level: University
Verticle Circular LoopA jet pilot puts an aircraft with a constant speed into a vertical circular loop. (a) Which is greater the normal force exerted on the seat by the pilot at the bottom of the loop or that at the top of the loop? why? (b) If the speed of the aircraft is 700 km/h and the radius of the circle is 2.0 km calculate the normal forces exerted on the seat by the pilot at the bottom and top of the loop? Express answer in terms of pilots weight mg.
Physics Force & Laws Of Motion Level: University
Equation of MotionA carnival ride carries passengers in a circular path with a radious of 7.7 meters. The ride makes a complete rotation every 4 seconds . (a) What is the passengers angular velocity due to circular motion? (b) What is the acceleration does the passenger experience? answer for these questions (a) 1.6 rad/ (b) 19m/s^2
Physics Force & Laws Of Motion Level: University
TorqueA sign weighing 400 N is suspended at the end of a 350 N uniform rod.
a. What is the tension in the support cable if it makes an angle of 35 degrees with the rod.
b. What would be the tension in cable if the angle were changed to 55 degrees Answers for these questions a) T = 1000N) T= 700N.
