1. At the surface of a certain planet, the gravitationalacceleration g has a magnitude of 11.5 m/s2. A 2.2 kg brass ball istransported to this planet.
(a) What is the mass of the brass ball on the Earth and on theplanet?
_____ Earth
_____ Planet
(b) What is the weight of the brass ball on the Earth and on theplanet?
___ Earth
___ Planet
2. A 399 kg piano slides 3.7 m down a(n) 27° incline and is keptfrom accelerating by a man who is pushing back on it parallel tothe incline (see figure). The effective coefficient of kineticfriction is 0.40.
(a) Calculate the force exerted by the man.
___ N
(b) Calculate the work done by the man on the piano.
___ J
(c) Calculate the work done by the friction force.
___J
(d) Calculate the work done by the force of gravity.
___ J
(e) Calculate the net work done on the piano.
___ J
1. At the surface of a certain planet, the gravitationalacceleration g has a magnitude of 11.5 m/s2. A 2.2 kg brass ball istransported to this planet.
(a) What is the mass of the brass ball on the Earth and on theplanet?
_____ Earth
_____ Planet
(b) What is the weight of the brass ball on the Earth and on theplanet?
___ Earth
___ Planet
2. A 399 kg piano slides 3.7 m down a(n) 27° incline and is keptfrom accelerating by a man who is pushing back on it parallel tothe incline (see figure). The effective coefficient of kineticfriction is 0.40.
(a) Calculate the force exerted by the man.
___ N
(b) Calculate the work done by the man on the piano.
___ J
(c) Calculate the work done by the friction force.
___J
(d) Calculate the work done by the force of gravity.
___ J
(e) Calculate the net work done on the piano.
___ J
