Answer:
The movement of continents changes wind patterns and ocean currents.
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Explanation:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force
Answer:
The tension in the middle string is 3.3 N
Explanation:
Two boxes move with same acceleration
The tension in the middle string is T
Lets start with the forces acting in the 2nd box
→ The tension T in the string in the direction of motion
Due to Newtons's Law
→ ∑ Force in direction of motion = mass × acceleration
→ T = M a
→ M = 1 kg
Substitute the value of M is the equation
→ T = a ⇒ (1)
The force acting on the 1st box
→ The force F in the direction of motion, and T in the string in opposite
direction of motion
→ F - T = 2M a
→ F = 10 N , M = 1 kg
Substitute These values in the equation
→ 10 - T = 2(1) a
→ 10 - T = 2 a ⇒ (2)
Substitute equation (1) in (2)
→ 10 - T = 2 T
Add T to both sides
→ 10 = 3 T
Divide both sides by 3
→ T = 3.3 N
<em>The tension in the middle string is 3.3 N</em>
The acceleration due to gravity g at height 7 times the radius of Earth above the surface of the Earth is 8.933 m/s².
<h3>What is acceleration due to gravity?</h3>
It is the acceleration caused by any object when placed on the surface on the Earth due to its weight.
The acceleration due to gravity is related to the distance as
g =GM/R²
where G is the gravitational constant = 6.67 x 10⁻¹¹ N.m²/kg²
Given is the height R = 7 x 6.4 x 10⁶ m and mass of Earth M = 6 x 10²⁴ kg
Substitute the values into the expression to find the acceleration due to gravity.
g = ( 6.67 x 10⁻¹¹ x 6 x 10²⁴)/ ( 7 x 6.4 x 10⁶)²
g = 8.933 m/s²
Thus, the acceleration due to gravity g at height 7 times the radius of Earth above the surface of the Earth is 8.933 m/s².
Learn more about acceleration due to gravity.
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