Physics 2d vectors

Projectile’s trajectory is a…

parabola

Horizontal and vertical motion are…

independent

Gravity influences projectile’s…

vertical motion

Projectiles are ______ objects

free falling

A projectile fired horizontally in an area of no air resistance maintains its horizontal speed because..

it is not acted on by any horizontal forces.

Air resistance affects a horizontally launched projectile by….

decreasing the range

As an object undergoing free fall motions falls, its

speed increases

A rock is thrown upward at a 50 degree angle. As it rises, the vertical component of the velocity...

decreases

A rock is thrown upward at a 50 degree angle. As it rises, the horizontal component of the velocity...

remains unchanged

A football is kicked into the air at a 45 degree angle. At the top of its trajectory, the velocity is…

entirely horizontal

A football is kicked into the air at a 45 degree angle. At the top of its trajectory, the acceleration is…

entirely vertical

A ball is thrown into the air at an upward angle. At what point does it have minimum speed?

At the path’s top

In absence of air resistance, ball travels greatest distance when thrown at

45 degrees

In absence of air resistance, ball rises to greatest height when thrown at

90 degrees

In absence of air resistance, ball stays in the air for the greatest time when thrown at

90 degrees

A bullet is fired horizontally at the same time an identical bullet is dropped from the same height as the gun. The bullets ______

hit the ground at the same time

A bullet fired horizontally hits the ground in 0.5 seconds. A bullet fired at twice the speed hits the ground in

0.5 seconds

The monkey will come out of the tree the instant the zookeeper shoots the banana. So, the zookeeper should aim _____

directly at the monkey

Two cannons are fired directly at each other, one from a cliff and one from the ground. The cannonballs will collide if they are fired….

at the same time

Dropping a package from a plane maintaining constant speed in a straight line means that the plane will be ________

directly above the package when it hits the ground

A rock is tossed straight up from a truck traveling with constant velocity. Without air resistance, the rock will land

in the truck

A projectile launched at 20 m/s east and 20 m/s west will…

drop straight to the ground

Satellites from the international space station…

fall constantly around the earth

Satellites are always more than 100 km high as so to be above the earth’s…

atmosphere

A stone thrown horizontally from a cliff will fall ________ vertically after one second, regardless of the throwing speed

5s