3 years ago

The owners want the speed at the bottom of the first hill doubled. How much higher must the first hill be built?

Physics

1 answer:

Sonja [21]3 years ago

3 0

Neglecting friction and air resistance, the first hill must be built 4 times higher than it is now.

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What is a disadvantage of using biomass as an energy resource?

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2 years ago

How long must a simple pendulum be if it is to make exactly one swing per four seconds? (That is, one complete oscillation takes

cricket20 [7]

Answer:

Length of the pendulum will be 3.987 m

Explanation:

We have given time period of the pendulum T = 8 sec

Acceleration due to gravity $g=9.81m/sec^2$

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We know that time period of the simple pendulum is given by

$T=2\pi \sqrt{\frac{l}{g}}$

$8=2\times 3.14 \sqrt{\frac{l}{9.81}}$

$l=3.987m$

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2 years ago

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2 years ago

Calculate Vector component in Y if the hypotenuse is 32 and angle is 45

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Answer:

The correct option is;

c. 22.6

Explanation:

The given parameters are;

The hypotenuse of the vector = 32

The angle of the vector = 45°

Therefore, the vector component in the y-axis is given as follows;

$v_y = v \times sin(\theta)$

Substituting the values from the question gives;

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The vector component in the y-axis, $v_y$ , is approximately 22.6.

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2 years ago

A force of 60 N is applied to a skier to pull him along a horizontal surface so that his speed remains constant. If the coeffici

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Answer:

$1200\ \text{N}$

Explanation:

F = Force on the skier = 60 N

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Force is given by

$F=\mu w$

$\Rightarrow w=\dfrac{F}{\mu}$

$\Rightarrow w=\dfrac{60}{0.05}=\dfrac{6000}{5}$

$\Rightarrow w=1200\ \text{N}$

Weight of the skier on which the force is being applied is $1200\ \text{N}$ .

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2 years ago