O objeto representado abaixo está em repouso quando surge uma força de 50N. A massa do objeto é de 10kg e a força de atrito entre o objeto e a superfície é de 20N. Determine a aceleração que ele adquire e a velocidade me 10 segundos. a) 5m/s2 e 50m/s; b) 3m/s2 e 30m/s; c) 2m/s2 e 20m/s;
d) 3m/s2 e 20m/s; e) n. d.a.

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?

What kind of waves require a medium to travel? question 6 options: light waves mechanical waves all waves need a medium to travel electromagnetic waves

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. she placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box. in this experiment, the warmth of the air is a(n) independent variable dependent variable constant control