Physics Force & Laws Of Motion Level: Misc Level
If the coefficient of static friction between your coffee cup and the horizontal dashboard of your car is u s=0.800, how fast can you drive on a horizontal roadway around a right turn of radius 30.0m before the cup starts to slide?If you go too fast, in what direction will the cup slide relative to the dashboard?
Physics Force & Laws Of Motion Level: Misc Level
Consider a lawnmower of weight w which can slide across a horizontal surface with a coefficient of friction (u) . In this problem the lawnmower is pushed using a massless handle , which makes an angle (theat) with the horizontal .Assume that Fh ,the force exerted by the handle, is parallel to the handle.
Physics Force & Laws Of Motion Level: Misc Level
If a person wanted to drag a 40 kg table across a floor the feet having a coefficient friction of 0.7, how much force does the person need to exert to start the table sliding and why is the table easier to drag if the person lifts the end of the table slightly so that two legs are off the floor?
Physics Force & Laws Of Motion Level: Misc Level
Use the concepts of acceleration, force and yield strength to explain why delicate goods shipped in a cardboard box are often first packed in or polyurethane foam?
Physics Force & Laws Of Motion Level: Misc Level
A material has a breaking stress of 700 MNm-2. what mass could be hung from a cable of this material if the diameter of the cable was 4mm?
Physics Force & Laws Of Motion Level: Misc Level
a car traveling at 20 m/s is brought to a halt by applying the brakes in 4 s. what is the magnitude of acceleration of the car?
Physics Force & Laws Of Motion Level: Misc Level
a safe with a mass of 150 kg is at rest on the floor what is the minimum horizontal force needed to move the crate if the coefficent of static friction between the safe and the floor is 0.3? (assume g=10 m/s^2)
Physics Force & Laws Of Motion Level: Misc Level
in an atwoods machine experiment the larger mass is 1.8 kg and the smaller mass is 1.2 kg ignoring friction the acceleration of the masses when released from released from rest is?
Physics Force & Laws Of Motion Level: Misc Level
an elevator is moving downward with an acceleration of 2.0 m/s^2. what is the force exerted on the elevator floor by a 75 kg person (assume g=10 m/s^2)
Physics Force & Laws Of Motion Level: Misc Level
The coefficient of kinetic friction between the block and the table is 0.506, and m 1 =0.150 kg hanging on the left side of the table and m3 =0.250 kg hanging on the right side of the table what should m2 on the table be if the system is to move at a constant speed?If m2 were to be 0.100 kg what would the magnitude of the acceleration of the system be?
Physics Force & Laws Of Motion Level: Misc Level
A spherical- shaped hollow steel shell, with a radius of 2.5 m, containing some instruments, is lowered by a cable into a lake.The shell with it contents weighs 7.2x10 (to the power of 5) N on the deck of the ship from which it is being lowered. What is the tension in the cable when the sphere is completely immersed in the water?
Physics Force & Laws Of Motion Level: Misc Level
The engines of a plane exert a force of 8.5 x10 10 N during the acceleration required for takeoff.If the plane has a mass of 4.3 x 10 8 kg, what is its acceleration?
Physics Force & Laws Of Motion Level: Misc Level
A net force of 5500.0 N accelerates a car from rest to 85.0 km/hr in 7.00 sec.(a) What is the acceleration of the car?
(b) What is the mass of the car?
Physics Force & Laws Of Motion Level: Misc Level
A 2500 kg car slows from a velocity of 120.0 km/hr to 10.0 km/hr in 8.0 sec.
(a) What is the acceleration over this interval?
(b) What force must be exerted in order to produce the change in velocity?
Physics Force & Laws Of Motion Level: Misc Level
5-A sledge may be either pulled with a rope or pushed from behind. Assume that in either case, the propelling force acts an angle of 45 degrees above the ground.
A- Draw the free body diagrams for both alternatives.
B- Which would be feel would be the most efficient?Why? Define efficient in your answer.
