Answer:
The vertical velocity of the skater upon landing is 10.788 meters per second.
Explanation:
Skateboarder experiments a parabolic movement. As skateboarder jumps horizontally off the top of the staircase, it means that vertical component of initial velocity is zero and accelerates by gravity, the final vertical speed is calculated by the following expression:
Where:
- Initial vertical speed, measured in meters per second.
- Final vertical speed, measured in meters per second.
- Gravitational acceleration, measured in meters per square second.
- Time, measured in seconds.
Given that 
, 
and 
, the final velocity of the skater upon landing is:
The vertical velocity of the skater upon landing is 10.788 meters per second.
I believe that the correct answer is c. The boundaries of earth's plates. This is because when the plates move the mantle seeps out through the gaps the previous plate had been at this is also called seafloor spreading because as the mantle seeps up it forms new crust that pushes the other plates further apart
Hint: VOLTage
What choice has the word 'volt' in it?
Answer:
The acceleration of the mosquito is 1 million (10⁶) times that of the car
Explanation:
From Newton’s Third Law, every action has an equal and opposite reaction. Therefore, when the car and the mosquito collide, the force the car exerts on the mosquito equals the force the mosquito exerts on the car.
F₁ = F₂
Also, from Newton’s Second Law, F₁ = ma₁
Force of the car, F₁ = 1000 * a₁
And force exerted by the mosquito, F₂ = 0.001 * a₂
Equating both sides
1000a₁ = 0.001a₂
Taking the ratio of the acceleration of the mosquito and that of the car, a₂/a₁:
a₂/a₁ = 1000/0.001
a₂/a₁ = 1000000
Therefore, the acceleration of the mosquito is 1000000 (10⁶) times that of the car
