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 perpendicular to the surface
parallel to the surface
equal in magnitude to the weight
up( perpendicular to the surface, parallel to the surface, equal in magnitude to the weight, up ) and equal in magnitude to mgcosθ
the weight of the box
gravity( mgcosθ, mgsinθ, mgtanθ, the weight of the box, gravity ).
A car of mass M collides with a truck of mass 3M. The force exerted by the car on the truck must be the force exerted by the truck on the car.
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).