A 5.0-kg box is given a brief push and travels 5.0 m up a plane that makes an angle of 30.0 A 5.00 x 10° N crate is at the top of a 5.00 m ramp. which is inclined at 20.0° with the horizontal. What is its potential energy? (g- 9.81 m/s?)
855 J
c. 815 J
b. 2350J
d. 8390 J

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?

Failure to accomplish erikson’s psychosocial task of late adulthood leads to despair. a. true b. false