Review from Final
1. A 490N person stands on a scale that is on the floor of an elevator. When the elevator is accelerating downward at 3.00m/s2
what does the scale read?
2. Two masses are a certain distance apart. If the distance between them is tripled then the gravitational force between them
increases/decreases (choose one) by a factor of _____.
3. A projectile is launched with speed v at an angle of θ above the horizontal. a) What happens to its vertical speed on as it
rises? b) What happens to the vertical speed as it falls? c) What happens to its horizontal velocity as the projectile rises
and falls? d) At the top of its path what is its vertical velocity, horizontal velocity, and total velocity?
4. A rock is shot from the ground at 14.0m/s at 34.0º above the horizontal. How long is it until the rock hits the ground?
5. A ball rolls off of a 2.50m tall (horizontal) table at 9.00m/s. How long is it until the ball it hits the ground?
6. A rock is thrown straight up into the air with a speed, v. What is the rock’s total velocity at the top of its path?
7. A ball with mass m and speed v bounces off of a wall and returns going the opposite direction at the same speed. What is
the magnitude of the impulse the ball receives from the wall?
8. A feather is dropped on the surface of the moon, where there is no air resistance. Draw the velocity vs. time graph for the
feather (pick down as positive).
9. If all of the forces on an object balance so that the net force is zero, which of the following COULD be true of the object: it
is turning; it is at rest; it is speeding up; it is slowing down, it is moving at 3m/s; it is changing direction; its path is a
parabola, it is accelerating at 9.8m/s2 downward; it is moving at -4m/s; it is moving in a circle?
Review from Final
1. A 490N person stands on a scale that is on the floor of an elevator. When the elevator is accelerating downward at 3.00m/s2
what does the scale read?
2. Two masses are a certain distance apart. If the distance between them is tripled then the gravitational force between them
increases/decreases (choose one) by a factor of _____.
3. A projectile is launched with speed v at an angle of θ above the horizontal. a) What happens to its vertical speed on as it
rises? b) What happens to the vertical speed as it falls? c) What happens to its horizontal velocity as the projectile rises
and falls? d) At the top of its path what is its vertical velocity, horizontal velocity, and total velocity?
4. A rock is shot from the ground at 14.0m/s at 34.0º above the horizontal. How long is it until the rock hits the ground?
5. A ball rolls off of a 2.50m tall (horizontal) table at 9.00m/s. How long is it until the ball it hits the ground?
6. A rock is thrown straight up into the air with a speed, v. What is the rock’s total velocity at the top of its path?
7. A ball with mass m and speed v bounces off of a wall and returns going the opposite direction at the same speed. What is
the magnitude of the impulse the ball receives from the wall?
8. A feather is dropped on the surface of the moon, where there is no air resistance. Draw the velocity vs. time graph for the
feather (pick down as positive).
9. If all of the forces on an object balance so that the net force is zero, which of the following COULD be true of the object: it
is turning; it is at rest; it is speeding up; it is slowing down, it is moving at 3m/s; it is changing direction; its path is a
parabola, it is accelerating at 9.8m/s2 downward; it is moving at -4m/s; it is moving in a circle?
Review from Final
1. A 490N person stands on a scale that is on the floor of an elevator. When the elevator is accelerating downward at 3.00m/s2
what does the scale read?
2. Two masses are a certain distance apart. If the distance between them is tripled then the gravitational force between them
increases/decreases (choose one) by a factor of _____.
3. A projectile is launched with speed v at an angle of θ above the horizontal. a) What happens to its vertical speed on as it
rises? b) What happens to the vertical speed as it falls? c) What happens to its horizontal velocity as the projectile rises
and falls? d) At the top of its path what is its vertical velocity, horizontal velocity, and total velocity?
4. A rock is shot from the ground at 14.0m/s at 34.0º above the horizontal. How long is it until the rock hits the ground?
5. A ball rolls off of a 2.50m tall (horizontal) table at 9.00m/s. How long is it until the ball it hits the ground?
6. A rock is thrown straight up into the air with a speed, v. What is the rock’s total velocity at the top of its path?
7. A ball with mass m and speed v bounces off of a wall and returns going the opposite direction at the same speed. What is
the magnitude of the impulse the ball receives from the wall?
8. A feather is dropped on the surface of the moon, where there is no air resistance. Draw the velocity vs. time graph for the
feather (pick down as positive).
9. If all of the forces on an object balance so that the net force is zero, which of the following COULD be true of the object: it
is turning; it is at rest; it is speeding up; it is slowing down, it is moving at 3m/s; it is changing direction; its path is a
parabola, it is accelerating at 9.8m/s2 downward; it is moving at -4m/s; it is moving in a circle?