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pav-90 [236]
3 years ago
9

Which refers to the rate of change in velocity?

Physics
2 answers:
SVETLANKA909090 [29]3 years ago
8 0

Answer:

acceleration is the answer

natka813 [3]3 years ago
4 0

Answer:

Acceleration

Explanation:

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The dog has ran 100 meters in 20 seconds and then 300 meters in 25 seconds what was the average speed of the dog over the entire
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Explanation:

the speed of the dog was 400

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You bought a freezer that is 2 feet wide, 4 feet long and 30 inches deep. What is the capacity of the freezer?
Neporo4naja [7]
Capacity of a freezer is actually the volume.
so it will be equal to width*length*depth= 2*4*30= 240 Answer
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3 years ago
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What is the kinetic energy of a 5 kg object moving at 4 m/s
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Answer:

40

Explanation:

rule: K.E = 1/2 m×v^2

1/2 × 5 × (4)^2= 40 joule

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If an object is moving to the right and there is a net force acting on it to the left, what will happen to the object?
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3 years ago
A 1.4-kg cart is attached to a horizontal spring for which the spring constant is 50 N/m . The system is set in motion when the
marin [14]

Answer:

A)

0.395 m

B)

2.4 m/s

Explanation:

A)

m = mass of the cart = 1.4 kg

k = spring constant of the spring = 50 Nm⁻¹

x = initial position of spring from equilibrium position = 0.21 m

v_{i} = initial speed of the cart = 2.0 ms⁻¹

A = amplitude of the oscillation = ?

Using conservation of energy

Final spring energy = initial kinetic energy + initial spring energy

(0.5) kA^{2} = (0.5) m v_{i}^{2} + (0.5) k x_{i}^{2} \\kA^{2} = m v_{i}^{2} + k x_{i}^{2} \\(50) A^{2} = (1.4) (2.0)^{2} + (50) (0.21)^{2} \\A = 0.395 m

B)

m = mass of the cart = 1.4 kg

k = spring constant of the spring = 50 Nm⁻¹

A = amplitude of the oscillation = 0.395 m

v_{o} = maximum speed at the equilibrium position

Using conservation of energy

Kinetic energy at equilibrium position = maximum spring potential energy at extreme stretch of the spring

(0.5) m v_{o}^{2} = (0.5) kA^{2}\\m v_{o}^{2} = kA^{2}\\(1.4) v_{o}^{2} = (50) (0.395)^{2}\\v_{o} = 2.4 ms^{-1}

5 0
3 years ago
Read 2 more answers
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