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4 years ago

5

A car accelerates uniformly from rest and covers a distance of 69 m in 58 seconds

1 answer:

Marta_Voda [28]4 years ago

6 0

I think 11 would be the answer, not sure

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A man pushes a heavy box. if the man exerts a force of 200 N on the box to keep it moving at a constant velocity what is the fri

Ad libitum [116K]

Answer:

Kinectic friction is the answer to the lower part of the question

5 0

3 years ago

Two blocks are connected by a massless rope that passes over a 1 kg pulley with a radius of 12 cm. The rope moves over the pulle

tangare [24]

Answer:

$F=1.159$

Explanation:

From the question we are told that:

Mass of pulley $M=1kg$

Radius $r=12cm$

Mass of block A $M_a=2.1kg$

Mass of block B $m_b=4.1kg$

Spring constant $\mu= 358 J/m2$

Generally the equation for Torque is mathematically given by

Since $\sumF=ma$

At mass A

$T_2-f_3=2.1a$

At mass B

$4.8-T_1=4.1a$

At Pulley

$R(T_1-T_2)=\frac{1*1*R^2}{2}\frac{a}{R}$

$R(T_1-T_2)=0.55a$

Therefore the equation for total force F

At mass A+At mass B+At Pulley

$(T_2-f_3+4.8-T_1+R(T_1-T_2)=2.1a+4.1a+0.55a$

$(T_2-f_3+4.8-T_1+R(T_1-T_2)=2.7a+4.8a+0.55a$

$-f_3+4.1=6.75a$

$-f_3=6.75a+4.8$

Since From above equation

$M_{eff}=6.7kg$

Therefore

$T=2\pi \sqrt{{\frac{M_{eff}}{k}}$

$T=2\pi \sqrt{{\frac{6.75}{\mu}}$

$T=0.862s$

Generally the equation for frequency is mathematically given by

$F=\frac{1}{T} \\F=\frac{1}{0.862}$

$F=1.159$

3 0

3 years ago

What is an example of Convection?

yKpoI14uk [10]

Boiling water. <span>heat goes from the burner into the pot which heats the water at the bottom. this hot water rises and cooler water moves down to replace it, causing a circular motion.</span>

3 0

3 years ago

In an electrical circuit, a voltage difference:

liberstina [14]

A. supplies energy to make charge flow

8 0

4 years ago

A straight line with a positive slope on a velocity-time graph indicates which of the following?

V125BC [204]

Answer:

constant acceleration

Explanation:

I may be wrong, but I'm almost positive cuz I am also taking physics. ;)

4 0

3 years ago