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Alla [95]
3 years ago
15

Why is acceleration measured in meters

Physics
1 answer:
Setler [38]3 years ago
4 0
Acceleration is measured in meters per second square.
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A police car parked on the side of the highway emits a 1200 Hz sound that bounces off a vehicle farther down the highway and ret
emmasim [6.3K]

f' = frequency observed by the police car after sound reflected from the vehicle and comes back to police car = 1250 Hz

f = frequency emitted by the police car  = 1200 Hz

V = speed of sound = 340 m/s

v = speed of vehicle = ?

frequency observed by the police car is given as

f' = f (V + v)/(V - v)

inserting the values in the above equation

1250 = 1200 (340 + v)/(340 - v)

v = 6.9 m/s

4 0
4 years ago
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What simple machines combine to make a shovel which is a compound
IRINA_888 [86]
B) lever and pulley is the answer
6 0
3 years ago
A small planet having a radius of 1000 km exerts a gravitational force of 100 N on an object that is 500 km above its surface. I
Mars2501 [29]
<h2>Option C is the correct answer.</h2>

Explanation:

Gravitational force is given by

                  F=\frac{GMm}{r^2}

         G=6.674×10⁻¹¹ m³⋅kg⁻¹⋅s⁻²

         M = Mass of object 1

          m = mass of object 2

          r = Distance between objects.

Here only variable is r value.

In case 1

             100=\frac{GMm}{(1000+500)^2}\\\\GMm=100\times 1500^2

In case 2

            F=\frac{GMm}{(1000+500+500)^2}\\\\F=\frac{GMm}{2000^2}\\\\F=\frac{100\times 1500^2}{2000^2}\\\\F=56.25N

Option C is the correct answer.

7 0
4 years ago
A grocery shopper tosses a(n) 9.0 kg bag of rice into a stationary 17.4 kg grocery cart. The bag hits the cart with a horizontal
noname [10]

Answer:

V=1.77m/s

Explanation:

#Using the conservation of momentum , momentum before equals momentum after(p=mv).

-Initial speed is 5.2m/s while the cart is at rest. After, the velocity will be of a combined(bag+cart) mass.

Hence:

9.0\times 5.2+17.4\times 0=(9+17.4)V\\\\V=\frac{9\times5.2}{9+17.4}\\\\=1.77m/s\\

Hence, the final velocity of the cart and bag is 1.77m/s

7 0
4 years ago
Energy can come from electricity, but it<br> can also come from water<br> false<br> true
Hitman42 [59]

Answer:

the answer is truth

Explanation:

6 0
3 years ago
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