A ball is thrown into the air with an initial velocity that has a horizontal component of 4.0 m/s [right] and a vertical component of 3.0 m/s [up]. What is the speed of the ball at the top of its trajectory (ignore air resistance).
The magnitude of the acceleration of the same ball is:
The horizontal acceleration of the ball is 0.
Box A is released from the top of a frictionless ramp inclined at 30 degrees (I couldn't find the symbol) to the horizontal at the same time that Box B is dropped from the same height into free fall. Which reaches the ground first.
The normal force of a box on an inclined plane is [blank_start]perpendicular to the surface[blank_end] and equal in magnitude to [blank_start]mgcosθ[blank_end].
perpendicular to the surface
parallel to the surface
equal in magnitude to the weight
the weight of the box
A car of mass M collides with a truck of mass 3M. The force exerted by the car on the truck must be [blank_start]equal to[blank_end] the force exerted by the truck on the car.
equal to, equal, same as
A person of mass M is in an elevator that has an acceleration of A [up]. The apparent weight of that person is M(A+g).