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katrin [286]
3 years ago
9

Plz help me with this activity :,v

Physics
1 answer:
maksim [4K]3 years ago
6 0
18 is A let me figure out the rest
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Which of the foolwing best define net force?
DochEvi [55]

Net force can be defined as the sum of force acting on an object in all the directions

.i.e Net force= F acting on a body at upward direction+ F at downward direction+ F at leftward direction+ F at rightward direction.

e.g if a body is at rest the sum of forces acting on body in all direction is zero

but if a body is moving its mean body is facing an unbalanced net force.

8 0
3 years ago
Most marble is composed primarily of
In-s [12.5K]
Mainly composed of Mineral calcite
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3 years ago
The cheetah is one of the fastest accelerating animals, for it can go from rest to 28.0 m/s in 5.20 s. If its mass is 100 kg, de
Setler79 [48]

Answer:

a)15077 W

b)20.2185 horse power

Explanation:

P=F*V

F=ma

a=Vf-VS/t

Vf=28m/s

t=5.2

a=28/5.2

a=5.384 m/s²

F=100kg*5.384m/s²

F=538.4 N

P=F*V

P=538.4N*28m/s

P=15077 W=20.2185 horse power

1W=0.00134 Horse power

6 0
4 years ago
What is the efficiency of a device that takes in 400 J of heat and does 120 J
777dan777 [17]

The efficiency of the device is 30 %

Explanation:

The efficiency of a heat engine is given by:

\eta = \frac{W}{Q_{in}}

where

W is the work done by the engine

Q_{in} is the heat in input to the engine

For the device in this problem, we have:

W = 120 J is the work done

Q_{in} = 400 J is the heat in input

Substituting, we find the efficiency:

\eta=\frac{120}{400}=0.30

which corresponds to an efficiency of 30%.

Learn more about work:

brainly.com/question/6763771

brainly.com/question/6443626

#LearnwithBrainly

7 0
3 years ago
Read 2 more answers
How is power related to distance and time?
Monica [59]

There is no direct relationship between power
and either of those quantities.

4 0
4 years ago
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