A 55.0 kg runner who weighs 539.0 N is accelerating at 3.2 m/s2. After 2

Physics

2 answers:

Darina [25.2K]3 years ago

8 0

Answer:

The answer is C. 352.0 kg-m/s

drek231 [11]3 years ago

4 0

Answer:

C. 352.0 kg-m/s

Explanation: Took the test on APEX

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After the collapse of a nebular cloud, atoms begin gravitating together to form a condensed center. What happens next in the sta

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4 years ago

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A block is pulled across a flat surface at a constant speed using a force of 50 newtons at an angle of 60 degrees above the hori

vladimir2022 [97]

The magnitude of the friction force is 25 N

Explanation:

To solve this problem, we just have to analyze the forces acting on the block along the horizontal direction. We have:

The horizontal component of the pulling force, $F cos \theta$ , where F = 50 N is the magnitude and $\theta=60^{\circ}$ is the angle between the direction of the force and the horizontal; this force acts in the forward direction
The force of friction, $F_f$ , acting in the backward direction

According to Newton's second law, the net force acting on the block in the horizontal direction must be equal to the product between the mass of the block and its acceleration:

$\sum F_x = ma_x$