Agirl exerts a horizontal force of 109 n on a crate with a mass of 31.2 kg. hint (a) if the crate doesn't move, what's the magnitude of the static friction force (in n)? 109 correct: your answer is correct. the static friction force is fs ≤ μsn. for an object with no acceleration at rest on a surface, fs equals the particular value required to keep the object at rest on the surface. n (b) what is the minimum possible value of the coefficient of static friction between the crate and the floor? (assume the crate remains stationary.)

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will