General Physics 1 Final Exam Flashcards
an object is moving in the negative direction and has a negative acceleration.
the velocity of the object is __________.
negative
an object is moving in the negative direction and has a negative acceleration.
the speed of the object is __________.
increasing
an object is moving in the positive direction and has a negative acceleration.
the velocity of the object is __________.
positive
an object is moving in the positive direction and has a negative acceleration.
the speed of the object is ___________.
decreasing
true or false: no net forces are acting on the car during interval B
true
true or false: net forces act on the car during intervals A and B
true
the magnitude of the net force acting during internal A is ___ during C
greater than
true or false: opposing forces act on the car during interval B
true
true or false: opposing forces act on the car during interval C
true
while suspended in space, an astronaut pushes on a more massive spacecraft.
a. both the spacecraft and astronaut accelerate away with very different accelerations
b. both the spacecraft and the astronaut accelerate away with very similar accelerations
c. only the astronaut accelerates
d. only the spacecraft accelerates
a. both the spacecraft and astronaut accelerate away with very different accelerations
a stone is thrown horizontally off a cliff and hits the ground below. a 2nd stone is dropped from rest off the same cliff, falls from the same height, and hits the ground below.
the displacement of the stones are _________.
different
a stone is thrown horizontally off a cliff and hits the ground below. a 2nd stone is dropped from rest off the same cliff, falls from the same height, and hits the ground below.
the time of flight for the 2 stones are ___________.
the same
a stone is thrown horizontally off a cliff and hits the ground below. a 2nd stone is dropped from rest off the same cliff, falls from the same height, and hits the ground below.
the speed just before impact to the ground are __________.
different
one person throws a baseball up in the air while a second person drops the baseball.
the magnitude of acceleration of the first baseball will be __________ the second baseball.
the same as
one person throws a baseball up in the air while a second person drops the baseball.
the direction of acceleration of the first baseball will be in the __________ direction while the direction of the acceleration of the second baseball will be in the _________ direction.
negative
negative
an object is moving at a constant velocity in the positive x direction.
what cannot be true and why?
a. no forces act on the object in the x direction
b. one force acts on the object in the positive x direction
c. one force acts on the object in the negative x direction
d. 2 forces act on the object in the x direction
e. 3 forces act on the object in the x direction
b. one force acts on the object in the positive x direction - the object would be speeding up
c. one force acts on the object in the negative x direction - the object would be slowing down
in state equilibrium, a block has a weight 10N. in situation a, a force of 7N is applied downward. in situation b, a tension of 2N is applied upward.
what is the magnitude of the normal force the surface applies back on the block in situation a?
17N
in state equilibrium, a block has a weight 10N. in situation a, a force of 7N is applied downward. in situation b, a tension of 2N is applied upward.
what is the magnitude of the normal force the surface applies back on the block in situation b?
8N
in state equilibrium, a block has a weight 10N. in situation a, a force of 7N is applied downward. in situation b, a tension of 2N is applied upward.
if a third force was applied in the x direction, would situation a or b result in a lower force of friction and why?
b would have a lower force of friction because it has a smaller normal force F=µFn
what max height will be reached by an arrow launched straight upward with an initial speed of Vi=35m/s?
63m
a rock is thrown at an angle 30° with an initial speed of 15m/s.
as the rock approaches the highest point, its speed __________.
decreases
a rock is thrown at an angle 30° with an initial speed of 15m/s.
as the rock moves up, the acceleration will point __________.
down
a rock is thrown at an angle 30° with an initial speed of 15m/s.
what is the vertical component of velocity (Vy) when the rock reaches its max height?
0m/s
a rock is thrown at an angle 30° with an initial speed of 15m/s.
what is the horizontal component of velocity (Vx) when the rock reaches its max height?
13m/s