You are moving into an apartment and take the elevator to the 6th floor. Suppose your...
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 730 N and that of your belongings is 980 N. (a) Determine the work done by the elevator in lifting you and your belongings up to the 6th floor (15.2 m) at a constant velocity. (b) How much work does the elevator do on you alone (without belongings) on the downward trip, which is also made at a constant velocity?
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You are moving into an apartment and take the elevator to the
6th floor. Suppose your...
E. Suppose you are standing on the scale in the elevator and the elevator is accelerating...
E. Suppose you are standing on the scale in the elevator and the
elevator is accelerating downward with
an acceleration smaller than 9.8 m/s2
i. Draw free-body diagrams of yourself, the scale, and the floor
of the elevator where it interacts
with the scale.
ii. How must the magnitude of the force exerted by the scale on
you compare with your own
weight?
iii. How must the reading on the scale compare with the reading
you make when the elevator...
_________An elevator suspended by a vertical cable is moving downward but slowing down. The tension in...
_________An elevator suspended by a vertical cable is moving downward but slowing down. The tension in the cable must be A) greater than the weight of the elevator. B) less than the weight of the elevator. C) equal to the weight of the elevator. ______ A bucket is being lowered by a very light rope with a constant downward velocity. The tension in the rope must be A) equal to the weight of the bucket. B) greater than the weight...
You step into a high-speed elevator on the top floor of a tall building and push...
You step into a high-speed elevator on the top floor of a tall building and push the button for the first floor. The elevator accelerates downwards. How does the normal force N exerted on you by the floor of the elevator compare to your weight? Select one: O a. the normal force is equal to your weight O b. It depends on how fast you are moving O c. the normal force is greater than your weight O d. the...
Suppose you slowly and at constant speed lift a 4 N book from the floor to...
Suppose you slowly and at constant speed lift a 4 N book from the floor to a shelf 2 m above the floor. (a) While your lifting it the net force on the book is zero(True,False) (b) While your lifting it the force by your hand against the book is 4 N(True,False) (c) The net work done on the book is zero(True,False) (d) The work done by your hand on the book is 8 Joules(True,False) (e) The net work done...
You board a stationary elevator on the ground floor. A uniform vertical gravitational field g =...
You board a stationary elevator on the ground floor. A uniform vertical gravitational field g = −9.8m/s2 is present. Before the elevator starts moving, you drop a ball from a height of 2 m above the floor. a) How long does it take for the ball to reach the floor of the elevator? b) How long does it take for the ball to travel from the floor to its maximum height above the floor (at which point you catch it...
3. You step into an elevator on the 44th floor of a tall office building. Each...
3. You step into an elevator on the 44th floor of a tall office building. Each floor is 3.50 m above the one below it You're alone in the elevator. You select your destination floor , then-as you wait for the door to close-you notice: There is a bathroom scale with a mass of 2.43 kg resting on the elevator floor. (Naturally-why wouldn't there be?) You decide to stand on the scales during the ride. (Naturally-why wouldn't you?) Weight (N)...
Suppose that while moving into an apartment you move a refrigerator into place by sliding it...
Suppose that while moving into an apartment you move a refrigerator into place by sliding it across the floor. The refrigerator weighs 1405 N and the coefficient of static friction between the floor and the refrigerator is 0.41. What is the least force you could exert on the refrigerator to move it?
You are in your favorite elevator, coming to a stop as you go from the ground...
You are in your favorite elevator, coming to a stop as you go from the ground floor to the 4th floor. a) What forces are acting on you as you are coming to a stop in the elevator? Normal force upward and Force of gravity upward Normal force downward and Force of gravity upward Normal force downward and Force of gravity downward Normal force upward and Force of gravity downward Just the Force of gravity downward b) As you are...
You are trying to move a light fixture into an apartment. There are hooks in the elevator so you ...
You are trying to move a light fixture into an apartment. There are hooks in the elevator so you hang the fixture on a hook with a chain. You don't want the fixture to touch the walls so you attach a rope to the side and are pulling horizontally as shown, holding the fixture stationary with respect to the elevator. Note 38 degrees chain rope fixture As the elevator ascends verticalily, the magnitude of the force from the chain on...
Determine the work done by you in the following situations. A) Pulling horizontally with a force...
Determine the work done by you in the following situations. A) Pulling horizontally with a force of 20 N on a 100 N sled. Sled moves 2 m at a constant velocity. (include units with answer) B) Pulling horizontally with a force of 40 N on a 100 N sled. Sled moves 2 m at a constant acceleration. (include units with answer) C) Pushing at 30° from horizontal with a force of 40 N on a 100 N sled. Sled...
E. Suppose you are standing on the scale in the elevator and the
elevator is accelerating downward with
an acceleration smaller than 9.8 m/s2
i. Draw free-body diagrams of yourself, the scale, and the floor
of the elevator where it interacts
with the scale.
ii. How must the magnitude of the force exerted by the scale on
you compare with your own
weight?
iii. How must the reading on the scale compare with the reading
you make when the elevator...
_________An elevator suspended by a vertical cable is moving downward but slowing down. The tension in the cable must be A) greater than the weight of the elevator. B) less than the weight of the elevator. C) equal to the weight of the elevator. ______ A bucket is being lowered by a very light rope with a constant downward velocity. The tension in the rope must be A) equal to the weight of the bucket. B) greater than the weight...
You step into a high-speed elevator on the top floor of a tall building and push the button for the first floor. The elevator accelerates downwards. How does the normal force N exerted on you by the floor of the elevator compare to your weight? Select one: O a. the normal force is equal to your weight O b. It depends on how fast you are moving O c. the normal force is greater than your weight O d. the...
3. You step into an elevator on the 44th floor of a tall office building. Each floor is 3.50 m above the one below it You're alone in the elevator. You select your destination floor , then-as you wait for the door to close-you notice: There is a bathroom scale with a mass of 2.43 kg resting on the elevator floor. (Naturally-why wouldn't there be?) You decide to stand on the scales during the ride. (Naturally-why wouldn't you?) Weight (N)...
You are trying to move a light fixture into an apartment. There are hooks in the elevator so you hang the fixture on a hook with a chain. You don't want the fixture to touch the walls so you attach a rope to the side and are pulling horizontally as shown, holding the fixture stationary with respect to the elevator. Note 38 degrees chain rope fixture As the elevator ascends verticalily, the magnitude of the force from the chain on...
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