While quarantining, Mr. Johnston picked-up inline skating to fight boredom. One day, Mr. Johnston with a mass of 115 kg was standing in his driveway in his skates (at rest) when out of nowhere his son Emmit who pounsed on his back like a spider monkey. Emmit has a mass of 59 kg and was moving at a velocity of 5.5 m/s. Approximately how fast did Mr. Johnston begin to roll towards the street with Emmit clinging to his back? a
5.5 m/s
b
324.5 kg m/s
c
33 m/s
d
1.9 m/s

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.