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shtirl [24]
1 year ago
13

If you drop an object, it will accelerate downward at a rate of 9.8 meters per second per second. if you instead throw it downwa

rds, its acceleration (in the absence of air resistance) will be?
Physics
1 answer:
Alla [95]1 year ago
6 0

In the absence of air resistance or any other force on it, an object's acceleration is the acceleration of gravity ... <em>9.8 m/s² downward</em>.

It doesn't matter if the object rolled off a table, or fell out of an eagle's mouth, or got shot straight up out of a cannon, or LeBron threw it at the basket for a 3-pointer, or Justin Tucker kicked it for a field goal, or Tiger Woods chipped it for a bogey, or Billy Joe MacAllister heaved it straight down off the Tallahatchie Bridge with all his strength.

It doesn't matter how it got STARTED moving, or how fast it's going right now, or what direction it's going now.

If there's no air resistance, and no OTHER force on the object that can speed it up or slow it down, then it's in "free fall", and it's accelerating at 9.8 m/s² downward.

The size and direction of its MOTION doesn't matter. But the size and direction of its acceleration is 9.8 m/s² straight down.  

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An object is at rest on an inclined plane. In which direction does the static friction force act?
Liono4ka [1.6K]

Gravity pulls on the object in the downward direction. The normal force to the inclined plane points in a direction perpendicular to the surface of the plane. Then for the object to be at rest, the frictional force must act parallel to the inclined plane, pointing in the upward direction.

8 0
2 years ago
State and briefly describe the applications of expansion<br>​
zlopas [31]
When solid material expands in response to an increase in temperature (thermal expansion), it can increase in length in a process known as linear expansion. for an example application of expansion and contraction.

examples =
(1) Changing of shape and dimensions of objects such as doors.
(2) Wall collapsing due to bulging.
(3) Cracking of glass tumbler due to heating.
(4) Bursting of metal pipes carrying hot water or steam are some of the disadvantages of thermal expansion of matter.
6 0
2 years ago
HELP!!! HURRY DUE BY 4:30!!!
Ipatiy [6.2K]
Work = force * distance. 
<span>You must produce twice as much energy as we are lifting the weight twice as high. </span>
<span>But because you aren't increasing the force, you need to increase the length of the ramp instead. </span>
<span>The new length will be twice as great as the previous length. </span>
<span>So 8 metres is required. </span>

Hope this helps.
4 0
3 years ago
Read 2 more answers
Which would heat up faster cotton or plastic
Angelina_Jolie [31]

Answer:

Plastic heats up faster :)

Explanation:

5 0
3 years ago
A jet airplane has a velocity of 1145 knots. A knot is 1 nautical mile (nm)/hr. A nautical
Tanya [424]

Answer:

1 m = 39.37 in = 39.37/12 ft = 3.28 ft

V = 1145 k/hr  = 1145k/hr * 6076 ft/k = 6957020 ft / hr

V = 6957020 ft/hr / 3600 s/hr = 1933 ft/sec

V = 1933 ft/sec / (3.28 ft / m) = 589 m/s

Check:

88 ft/sec = 60 mph

(1145 k/hr * 6076 ft / k) 3600 sec/hr = 1933 ft/sec = 589 m/s

1933 ft/sec / (88 ft/sec) * 60 mph = 1318 mph

Also,  1318 / 1145 = 6076 / 5280       as it should

4 0
2 years ago
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