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3 years ago

3. What average net force is required to stop a 7 kg shopping cart in 2 s if it's initially

Physics

1 answer:

stiv31 [10]3 years ago

8 0

-12.25N

Explanation:

Given parameters:

Mass of shopping cart = 7kg

Time = 2s

initial velocity = 3.5m/s

Unknown:

Average net force required to stop the cart = ?

Solution;

According to newton's second law"acceleration of body results when a net force acts on a body".

F = ma

where F is the force

m is the mass

a is the acceleration

Acceleration is the change in velocity with time

a = $\frac{v - u}{t}$

Therefore;

F = m x $\frac{v - u}{t}$

v is the final velocity, in this case it is zero, 0

u is the initial velocity

t is the time taken

Putting in the parameters:

F = 7 x $\frac{0- 3.5}{2}$ = -12.25N

This force that will stop the cart will be directed in the opposite direction with a magnitude of 12.25N

Learn more:

Newton's law brainly.com/question/11411375

#learnwithBrainly

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Thw question is not complete. The complete question is;

Charge of uniform linear density (6.7 nCim) is distributed along the entire x axis. Determine the magnitude of the electric field on the y axis at y = 1.6 m. a. 32 N/C b. 150 NC c 75 N/C d. 49 N/C e. 63 NC

Answer:

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Explanation:

We are given;

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