Aballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. what pressure is she exerting on the floor?

Options for the question;

A. 4.59 × 105 Pa

B. 4.59 × 103 Pa

C. 4.59 × 101 Pa

D. 4.59 × 10ˉ1 Pa

E. 4.59 × 10ˉ3 Pa

Pressure = 458000 = 4.58 x 10^5 Pa; Option A

Explanation:

Bringing out the parameters in the question;

Weight = 103 lbs = 46.72 kg (Upon conversion by diving by 2.205)

Area occupied = 10.0 cm2 = 0.001m2 (Upon conversion by dividing by 10000)

Pressure = ?

The relationship between pressure and Area is given as;

Pressure (in pascals) = Force(N) / Area (m2)

Force = Mass * Gravity = 46.72 * 9.8 = 458 N

Pressure = 458 / 0.001 = 458000 = 4.58 x 10^5 Pa

yes it is balanced

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)