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Maksim231197 [3]
3 years ago
14

How much force is needed to stop a 120-kg ice-hockey player if he decelerates at 20 m/s²?

Physics
1 answer:
Troyanec [42]3 years ago
3 0

ANY force at all, acting in the right direction, will stop him. 
But smaller forces will take longer.

In order to either speed him up or slow him down at the rate
of 20 m/s every second, the force required is

           (mass) x (acceleration) = (120 kg) x (20 m/s²)

                                               = (2400 kg-m/s²) = 2400 N .

The force can either increase or decrease his speed at that rate,
depending on the direction in which it acts on him.

If the force is exerted opposite to the direction in which he's already
moving, then it can stop him if it continues long enough. 

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3 years ago
niobium metal becomes a superconductor when cooled below 9 k. its superconductivity is destroyed when the surface magnetic field
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5 0
1 year ago
An 4-kg ball experiences a force and accelerates at a rate of 1.5 m/s.
ANTONII [103]

Answer:

6.0 N

Explanation:

The strength of a force is expressed as the magnitude of the force in Newton.

The formula to apply here is :

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3 years ago
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7 0
3 years ago
The weight of a standard object defined as having a mass of exactly 2.9 kg is measured to be 28.449 n. in the same laboratory, a
PtichkaEL [24]
Mass of the object m = 2.9 kg 
Force F1 = 28.449 N 
F1 = m1 x a => a = F / m => 28.449 / 2.9 => a = 9.81, which is gravitational acceleration. 
In the same lab, a = g = 9.81, second object F2 = 48.7N = m2 x a 
m2 = F2 / a => 48.7 / 9.81 => m2 = 4.96 kg 
Mass of the second object m2 = 4.96 kg
4 0
3 years ago
Read 2 more answers
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