2 years ago

5. If you walk 70 meters north in 5 minutes and 20 meters south in 15 seconds. What was the average

Physics

1 answer:

Tpy6a [65]2 years ago

3 0

Answer:

kjfvkuzfvnv

Explanation:

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Please help me with this review question.

jolli1 [7]

Answer:

28.7%

Explanation:

efficiency = work output /work input × 100

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2 years ago

The ballistic pendulum is a device used to measure the speed of a projectile such as a bullet. The projectile of mass m is fired

My name is Ann [436]

Answer:

Relation between initial speed of bullet and height h is given as

$v = \frac{m + M}{m}\sqrt{2gh}$

Explanation:

As we know that system of block and bullet swings up to height h after collision

So we have

$(m + M)gh = \frac{1}{2}(m + M)v_1^2$

so we have

$v_1 = \sqrt{2gh}$

so speed of the block + bullet just after the impact is given by above equation

Now we also know that there is no force on the system of bullet + block in the direction of motion

So we can use momentum conservation

$mv = (m + M)v_1$

now we have

$v = \frac{m + M}{m}\sqrt{2gh}$

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3 years ago

When steam condenses 1. All of these occur. 2. None of these occur. 3. molecules move closer together. 4. it changes from the ga

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2. None of these occur

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Examples of uniform velocity

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When a truck travels in equal distances in equal intervals of time then we say that the body has got a uniform velocity. In the above example a truck is traveling at 5 miles in all the positions at A, B, and C and all in the intervals of 5 minutes each.

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2 years ago

Which factors could be potential sources of error in the experiment? check all that apply.

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(A)energy lost in the lever due to friction

(C) visual estimation of height of the beanbag

(E)position of the fulcrum for the lever affecting transfer of energy

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3 years ago

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