When an animal jm the tion be grea ea by as the lenerh(a) What is the e would in

Question

When an animal jm the tion be grea ea by as the lenerh(a) What is the e would increase by 1 000 and equal to uscles into between). The maximum force of fonce scle is this force times the length is If the l n bereate than 1 H tion) for How high equal to the value obtained in part (a)? al arca, releas ck shown in A block of mass m 5,00 kg is relea from point 8 and slides on the fr from point ind a flea by a factor of 1 000, springs maximum compression be tss ck showe and d increase by 1 000. How high to jump? (Don't forget that the er thar the s6 and slides on the frictionless trac. om m the top of and (b) the net work done by the gravitational f d is taken to block as it moves from point from to C e force on the s as well.) Figure P5.36. Determine (a) the block's s angle of 30.0° above the hori- 20 x 10m/ where the ground taken tal mechanical energy of the ctile is traveling 85.0 m/s at How much work has been n? (c) What is the speed of t hits the ground if air fric- uch work on the projectile it was going up? orizontally with an initial ve a flat, desert surface. before the projectile hits of m, tb, h, and g: (a) the the projectile, (b) the ctile since it was fired, 37. Tarzan projectile. (d) Are any an le is changed 17 5.00 m 3.20 m 2.00 m igure P5.36 swings on a 30.0 m-long vine initia

Explanation / Answer

here,

mass , m = 5 kg

a)

let the block's speed at B be vB

using conservation of energy

m * g * ( 5 - 3.2) = 0.5 * m* vB^2

9.81 * ( 5 - 3.2 ) = 0.5 * vB^2

solving for vB

vB = 5.94 m/s

let the block's speed at C be vC

using conservation of energy

m * g * ( 5 - 2) = 0.5 * m * vC^2

9.81 * ( 5 - 2 ) = 0.5 * vC^2

solving for vC

vC = 7.67 m/s

b)

the work done by gravitational force on the block as it moves from A to C , Wg = m *g * (5 - 2)

Wg = 5 * 9.81 * ( 5 - 2) J

Wg = 147.15 J

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