A. a lever
Explanation:
To remove a nail from wood, a lever will be the best machine to use. In a lever, effort is applied to move a large load. The nail is treated as the load.
- Most hammers have nail removers that can be used to pull out nails.
- The force is applied at the handle.
- The head of the hammer has a fulcrum and nail remover part where the load is.
- This gives a large mechanical advantage and the nail can be pulled out.
- Wedge, wheel and axle and movable pulley are not machines that works as nail removers.
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Runner A speed is 3.81 meters per second
Runner b speed is 4.06 meters per second
This can be found by converting the minutes to entirely seconds and dividing the total distance ran by how many seconds they ran
Answer:
Force,
Explanation:
Given that,
Charge 1,
Charge 2,
Distance between charges, d = 3 m
We need to find the force between charges. The electric force between charges is given by :
k is electrostatic constant
So, the force between charges is . Hence, this is the required solution.
Every unit of density is
(a unit of mass) divided by (a unit of volume) .
The one most widely used is [ gram/cubic centimeter ] , but there's no reason that you MUST use this same unit every time you talk about density. You can use (any unit of mass) divided by (any unit of volume) that you want ... the best choices are always the ones that end up with the most convenient number.
Whatever units of mass and volume you decide to use, it's easy for anybody to convert it to [ gram/cubic centimeter ] if they want to.
Answer:
7808 m/s
Explanation:
Find NE velocity after 60 s of acceleration in that direction:
= a t = 28.4 m/s^2 * 60 s = 1704 m/s
Vertical component = 1704 sin 45 = 1204.9 m/s
Horiz component = 1704 cos 45 = 1204.9 m/s
Add the two vertical components
6510 + 1204.9 = 7714.9 m/s = vertical velocity
Pythagorean theorem to find resultant of vertical and horiz v's
Vf ^2 = 1204.9^2 + 7714.9^2 0
Vf = 7808. m/s