(a)two persons are applying force on two opposite sides of a moving karte the card still moves with the same speed in the same direction What do you infer about the magnitude and direction of force applied.
(b) why do deep sea divers have to wear special suits before going for diving at the depths?
Answers
Answer:
b. because special suits saves them from crushing when they go too deep in the sea
a.because they are pushing in the hills
Explanation:
a. Two persons are applying forces on two opposite sides of a moving cart, but the cart still moves with the same speed in the same direction.
This leads us to a conclusion that both are applying an equal magnitude force, and the direction of force by both of them is opposite to each other.
As a result both the forces cancel out each other(Resultant force =0) and the cart continues to move with the same speed in the same direction.
b. Humans are used to only a specific range of pressures. At sea level, we feel one atmosphere. But if we go higher up, the air is thinner, less dense, and has less pressure. When we go to the depths of the seas, we have many atmospheres, water is heavier and has way more pressure. At both these levels, humans cannot comforably move around, they could even get injured.
Pressure suits can help humans withstand different pressures by protecting us from the difference around us. Jet pilots can use pressure suits for high altitudes to apply pressure to different body parts (partial pressure suits) and astronauts will have pressure applied to the entire body (full pressure). Deep sea divers will have an atmospheric diving suit which block the heavy pressure of the water around them, and keep a decent pressure inside.
Hope it helps!!!