physics ser

A cannon ball is fired horizontally from a cannon. At the same time a similar cannon ball is dropped from the same height. The fired cannon ball will:

hit at the same time as the dropped cannon ball

Total mass vs acceleration

inverse

Mass difference vs acceleration

linear

a ball is thrown vertically upwards. describe its acceleration and velocity as it travels and reaches max height.

Velocity → constant

Acceleration → downward (gravity)

In a projectile, when the initial velocity is doubled, what happens to air time, horizontal distance, and acceleration?

Air time → Same

Acceleration → Same

Horizontal distance → Double/increase

ball’s speed at maximum height = ?

horizontal component

when in an elevator, when is the force pushing up on your feet greater than the force pushing down?

never. g > N

a tennis ball hits a concrete wall. how does the force exerted by the ball on the wall compare with the force exerted by the wall on the ball?

theyre equal forces. magnitude is the same.

an object is pulled by a horizontal tension force along the ground. the object is speeding up with constant acceleration, and experiences friction. what is true about the forces on the object?

more tension from the horizontal tension force. friction < tension bc its moving.

how to find acceleration?

a = f/m

mass does not have an effect on friction

true

radius has linear effect on friction

true

speed has quadratic effect on friction

true

car’s acceleration will be straight to velocity points

true

if acceleration is in the opposite direction, its slowing down.

true