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Marta_Voda [28]
3 years ago
8

A speed skater moving across frictionless ice at 8.8 m/s hits a 6.0 m -wide patch of rough ice. She slows steadily, then continu

es on at 5.8 m/s . What is her acceleration on the rough ice?
Physics
1 answer:
irina [24]3 years ago
4 0

Recall that

<em>v</em>² - <em>u</em>² = 2 <em>a</em> ∆<em>x</em>

where <em>u</em> and <em>v</em> are initial and final velocities, respectively; <em>a</em> is acceleration; and ∆<em>x</em> is the distance traveled (because the skater moves in only one direction).

So we have

(5.8 m/s)² - (8.8 m/s)² = 2 <em>a</em> (6.0 m)

<em>a</em> = ((5.8 m/s)² - (8.8 m/s)²) / (12 m)

<em>a</em> = -3.65 m/s²

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Okay please help me all my assignments are due tomorrow! I need to know 5 examples of all 6 simple machines that can be found in
iren [92.7K]

Answer:

Inclined Plane – A ramp, for example a wheelchair ramp. Paired inclined planes make a pitched roof.

Wheel & Axle – On lawnmowers and wheelbarrow. Also, found in cabinet door glides and on appliances. Another common example – door knobs and even inside those locksets.

Lever – The bottle opener. Tools – the crowbar, and scissors or pliers. Double Levers – a door, a toilet seat, a broom.

Pulley – Old wood windows, some garage doors, workshop or garage lifting systems.

Wedge – The shim – used throughout the home in construction. For example, when installing doors, windows, cabinets, etc. Sometimes used to level furniture or chairs.

Screw – Like the wedge, above, well, you couldn’t build a house without screws. Certain types of plumbing valves. Plus, a jar lid is a popular example.

Now for deeper look at the simple machines found around our homes.

The hope this will be helpful.

3 0
3 years ago
A rock is stuck deep in the dirt. When you pull on the rock to remove it, what type of force are you exerting?
aleksandrvk [35]
It is Tension as the other 3 answer choices would not make sense. Compression would mean you are pressing the rock on both sides or in this case, pushing it into the dirt. It can't be nuclear force as you are pulling out a rock. Air resistance would not make sense either as there is no air involved in the scenario at all.
4 0
4 years ago
Read 2 more answers
A force when you are bulling an object is ............................force​
dsp73
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4 0
3 years ago
Which of the answers shows three examples of a physical change
Wittaler [7]
B would be the correct answer. All the other choices consist of physical changes
5 0
3 years ago
Yvonne and Eddy are riding a ferris wheel at the Dade County Fair. If the radius of the ferris wheel is 15.0 m, and it rotates o
MA_775_DIABLO [31]

Answer:

2.69 m/s

Explanation:

The equation used is v=(2πr)/T

( (2) (π) (15.0) ) / (35) = 2.69

8 0
3 years ago
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