A suspicious-looking man runs as fast as he can along a moving sidewalk from one end to the other, taking 2.50 s. Then security
2 answers:
Answer:
The ratio of the man's running speed to the sidewalk's speed: 5: 26.
Explanation:
Let the distance between the sidewalk from one end to the other be x
Distance covered by the man = x
Time taken by the person to cover x distance = 2.50 seconds
Speed of the man while running to other end point = S
..[1]
Distance covered by the man by running back to his starting point after agents appears = x
Time taken by the person to cover x distance after agents appears = 13.0 seconds
Speed of the man while running back to starting point after agents appears = S'
...[2]
The ratio of the man's running speed to the sidewalk's speed:
[2] ÷ [1]
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Answer:
C. Why you must push harder to move a car farther.
Explanation:
Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.
Mathematically, it is given by the formula;
Hence, Newton's 2nd Law explains why you must push harder to move a car farther because of its mass. Thus, it is important to increase the force that the engine provides and decrease the mass of the car.