Consider a keen little boy who is having a wagon race with a friend. he starts from rest and
then begins to accelerate to the left.
a) if the boy pulls with more force, will his wagon accelerate more or less than before?
b) if he pulls with the same force, but adds more books to his pile, will his wagon accelera
more or less than before?

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f