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lana66690 [7]
3 years ago
14

Two blocks of ice , one four times as heavy as the other, aren at rest on a frozen lake. a person pushes each block the same dis

tance d.ignore friction and assume that an equal force F is exerted on each block. which of the following statements is true about the kinetic energy of the heavier block after the push?A) it is smaller than kinetic energy of the lighter blockB) it is equal to the kinetic energy of the lighter blockC) it is larger than the kinetic energy of the lighter blockD) it cannot be determined without knowing the force and the mass of each block
Physics
1 answer:
LenKa [72]3 years ago
8 0

Answer:

The correct answer is B: the kinetic energy of the heavier block is equal to the kinetic energy of the lighter block.

Explanation:

Hi there!

The work done on each block is calculated as follows:

W = F · d

Since the two blocks were pushed the same distance with the same force, the work done on each object is the same.

Using the work-energy theorem, we know that the work done on an object is equal to its change in kinetic energy (KE):

W = ΔKE

W = final KE - initial KE

Since the objects are at rest, initial KE = 0, then:

W = final KE

Since the work done on each block is the same, so will be its final kinetic energy.

The correct answer is B: the kinetic energy of the heavier block is equal to the kinetic energy of the lighter block.

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Answer: Option (a) is the correct answer.

Explanation:

Global Positioning Systems (GPS) is a system which uses a network of satellites to construct maps. So, that it would be easy to trace location of a person, or to reach over a certain place.

It helps an individual by showing the route of destination wherever he/she wants to reach along with the total time to reach over the place.

Thus, GPS can determine the elevation of a given area and also it can determine latitude and longitude of a given area. As each GPS satellite broadcasts with a high power, narrow bandwidth, down link signal which can be received by our small hand held receiver antenna called mobile phone.

A GPS cannot determine the composition of soil on mountain ranges.

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Which of Newton's laws
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Answer:

Newton's 2nd law think soo

8 0
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2. A company hires a security firm to patrol their stores and watch out for thieves. What is this an example of?
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3 years ago
The maximum force that a grocery bag can withstand without ripping is 250 n. Suppose that the bag is filled with 20 kg of grocer
zhannawk [14.2K]

Answer:

Groceries stay in the bag.

Explanation:

Given:

Maximum force = 250 N

Bag filled with = 20 kg

Lifted acceleration = 5.0\ m/s^2

Solution:

We need to calculate the exerted force on the grocery bag by using Newton's second law.

F = ma

Where:

F = Exerted force on the object.

m = Mass of the object in kg

a = Acceleration of the object in m/s^2

Now, we substitute m = 20 kg and a = 5.0\ m/s^2 in Newton's second law,

F = 20\times 5.0

F = 100\ m/s^2

Since, the exerted force on the bag is less than 250 N, the groceries will stay in the bag.

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Answer:

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