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Likurg_2 [28]
3 years ago
12

Write a paragraph of no less than five sentences explaining how Newton's First Law of Motion supports people's need to wear seat

belts when riding in a moving car. Remember to use proper grammar and mechanics when writing your paragraph.
Physics
1 answer:
Inessa [10]3 years ago
7 0
Newton's first law can be taken to mean that if something is moving it tends to keep moving. if at rest it tends to stay at rest.

so, in a car, you and the car are both moving, say at constant speed. Now you're not actually connected to the car as in clamped to it, not yet at least. You're simply sitting in it at rest with respect to it.

but, someone slams on the brakes for whatever reason. The car slows down/stops. what do you do ? well, you would keep going. and moving a few feet in a car can be dangerous, esp if you're moving at high speed. Unless of course you're clamped to the seat, and the seat is clamped to the car and the car is clamped together. then when the car brakes, yes you'll feel the braking effect, but the belt will restrict your movement, keeping you safe, if shocked and bruised.
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Heat pumps move heat from __________ to __________ areas & REQUIRES energy. *
sergejj [24]
The correct answer to this question is false
8 0
3 years ago
Find your mass if a scale on earth reads 650 N when you stand on it.
netineya [11]

Weight = (mass) x (gravity)

Acceleration of gravity on Earth = 9.8 m/s²

                                           Weight on Earth = (mass) x (9.8 m/s²)

Divide each side by  (9.8 m/s²):          Mass = (weight) / (9.8 m/s²)

                                                            Mass = (650 N) / (9.8 m/s²)

                                                           Mass = 66.33 kg  (rounded)
 
7 0
4 years ago
According to Newton's second law, how are acceleration and mass related? Directly or indirectly when force is constant?
Aliun [14]
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
4 0
3 years ago
At a certain moment, a car travelling at 40mph begins braking for a railroad crossing. Assume thatthe acceleration is constant (
egoroff_w [7]

Answer:

Part a)

v_f = 17.88 - (0.15) t

Part b)

d = 1072.8 m

Explanation:

As we know that initial speed of the car is

v = 40 mph

v = 40 \times (\frac{1609}{3600})

v = 17.88 m/s

now we have

v_f = v_i + at

0 = 17.88 + a(120)

a = -0.15 m/s^2

Part a)

As we know that acceleration is constant here

so we have

v_f = v_i + at

v_f = 17.88 - (0.15) t

Part b)

distance moved by the car is given as

d = \frac{v_F + v_i}{2} t

now we have

d = \frac{0 + 17.88}{2}(120)

d = 1072.8 m

3 0
3 years ago
A coil consists of 180 turns of wire. Each turn is a square of side d=30 cm, and a uniform magnetic field directed perpendicular
alexira [117]

Answer:

Emf induced i equal to 329.4 volt

Explanation:

Note : Here i think we have to find emf induced in the coil

Number of turns in the coil N= 180

Sides of square d = 30 cm = 0.3 m

So area of the square A=0.3\times 0.3=0.09m^2

Magnetic field is changes from 0 to 1.22 T

Therefore dB=1.22-0=1.22T

Time interval in changing the magnetic field dt = 0.06 sec

Induced emf is given by

e=-N\frac{d\Phi }{dt}=-NA\frac{dB}{dt}

e=-180\times 0.09\times \frac{1.22}{0.06}=329.4volt

8 0
4 years ago
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