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Lady bird [3.3K]
3 years ago
6

A lorry of mass 4000 kg is travelling at a speed of 4 m/s.

Physics
1 answer:
bulgar [2K]3 years ago
7 0

Answer:

KE = 32,000J

v = 8m/s

Explanation:

KE = .5*m*v²

KE = .5*4000kg*(4m/s)²

KE = 32,000J

32,000J = .5*1000kg*v²

v² = 64

v = 8m/s

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Gre4nikov [31]

Answer:

15,00kg

Explanation:

here's your solution

=> force = 45,000N

=> acceleration = 30m/s^2

=> mass = ?

=> Mass = force/acceleration

=> mass = 45,000/30

=> mass = 15,00kg

hope it helps

6 0
3 years ago
. What is a normal force? It acts against an object slowing it down. It acts perpendicular to an object. It acts with an object
Georgia [21]

Answer:

Explanation:

This is basically asking you what the definition of Normal force is. Normal force is the force that pushes back against the weight of something that is sitting (or standing or lying) perpendicular to it. That's why, when you stand on a floor you don't crash through the floor OR go shooting up into space. The Normal force is equal but opposite to your weight. The floor exerts the normal force (pushing up and is positive) while your weight is opposing it (pushing down and is negative.)  Perpendicular is the key word here, I believe.

8 0
3 years ago
The direction of applied force has to be .............. to the distance in order to say work is done​
Veronika [31]

Answer:

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Explanation:

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When the angle between the force and the displacement is 90 degree, the work done is zero.

To get the maximum work the angle between the force and the displacement is 0 degree.

So, to get the work done by the force the angle between the force and displacement is 0 degree that means the force and displacement is parallel to each other.

4 0
3 years ago
Why can’t kinetic emerger ever be greater than potential energy
melomori [17]

Answer:

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Explanation:

This is due to the reason that some of the energy is lost in the form of friction, heat energy, light energy etc. For example, a ball bounces to a height h in its first bounce.

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11111nata11111 [884]

Answer:

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Explanation:

<em><u>Radhe</u></em><em><u> </u></em><em><u>Radhe</u></em><em><u>❤</u></em>

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