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ra1l [238]
3 years ago
8

1. A penny is dropped from the top of a building 290 m high. Ignoring air resistance, if

Physics
2 answers:
pickupchik [31]3 years ago
6 0

Answer:

9.8m/s

Explanation:

Semenov [28]3 years ago
5 0

Answer: The speed 1934

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You drive a car 640 m to the east, then 340 m to the north what is the magnitude of your displacement
mixer [17]

Magnitude of displacement = \sqrt{640^2 + 340^2}

Adding the squares gives displacement = \sqrt{525,200}

Displacement =  \sqrt{525,200} ≈ 724.7m

6 0
2 years ago
The rate at which energy is transferred is called
makvit [3.9K]

Answer:

The rate at which energy is transferred is called power and the amount of energy that is usefully transferred is called efficiency.

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3 years ago
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What is the basic difference between a nuclear fission reaction and a nuclear fusion reaction?
Ipatiy [6.2K]
The answer is a. nuclear fission is breaking up
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3 years ago
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As you ride a bicycle on the sidewalk with a speed of
mixer [17]

Answer:

1.2 seconds

Explanation:

distance = ((final speed + initial speed) * time)/2

Here given:

  • distance: 3.8 meter
  • initial speed: 6.4 m/s
  • final speed: 0 m/s

Solving steps:

3.8 = ((0 + 6.4) * time))/2

3.8 = 3.2(time)

time = 3.8/3.2

time = 1.1875 seconds ≈ 1.2 seconds

5 0
1 year ago
Find the force necessary to start the crate moving, given that the mass of the crate is 32 kg and the coefficient of static fric
fiasKO [112]

Answer:

178.75 N

Explanation:

The force necessary to start moving the crate must be equal to or more than the frictional force (resistive force) acting on the crate but moving in an opposite direction to the frictional force.

So, we find the frictional force, Fr:

Fr = -μmg

Where μ = coefficient of friction

m = mass

g = acceleration due to gravity

The frictional force is negative because it acts against the direction of motion of the crate.

Fr = -0.57 * 32 * 9.8

Fr = - 178.75 N

Hence, the force necessary to move the crate must be at least equal to but opposite in direction to this frictional force.

Therefore, this force is 178.75 N

3 0
2 years ago
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