La Segunda Ley de Movimiento de Newton establece que a. los cuerpos en movimiento no pueden demostrar aceleración.
b. para cada fuerza de acción existe una reacción.
c. las fuerzas que actúan en objetos no causan aceleración.
d. la fuerza neta es igual al producto de la masa y la aceleración.

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?