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Answer:
The box will be moving at 0.45m/s. The solution to this problem requires the knowledge and application of newtons second law of motion and the knowledge of linear motion. The vertical component of the force Fp acts vertically upwards against the directio of motion. This causes a constant upward force of 23sin45° to act on the box. Fhe frictional force of 13N also acts vertically upwards and so two forces act upwards against rhe force of gravity resulting un a net force of 0.7N acting kn the box. This corresponds to an acceleration of 0.225m/s². So in w.0s after i start to push v = 0.45m/s.
Explanation:
Answer:
772.65 years.
Explanation:
Semi major axis = R = 84 AU = 1.257 × 10¹³ m
According to the 3rd law of Kepler, T² = 4 π² R³ / GM
Here R is the semi major axis. G = 6.67 × 10⁻¹¹ SI units.
M is the mass of the Sun = 1.98 x 10³⁰ kg
T² = 4 (3.14)³ (1.257 × 10¹³ )³÷ (6.67 × 10⁻¹¹)(1.98 x 10³⁰)
⇒ Time period = T = 2.44 x 10¹⁰ seconds
1 s = 3.17 × 10⁻⁸ years
Converting the seconds to years, T = 772.65 years.
The tension in the cables as the elevator travel upwards is 1,960 N.
The given parameters:
- Mass of the elevator, m = 200 kg
<h3>Newton's second law of motion;</h3>
Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.
The tension in the cables as the elevator travel upwards is calculated by applying Newton's second law of motion as shown below;
T = ma + mg
where;
- a is the acceleration of the elevator
- g is the acceleration due to gravity
At constant velocity, acceleration is zero (a = 0)
T = m(0) + mg
T = mg
T = 200 x 9.8
T= 1,960 N
Thus, the tension in the cables as the elevator travel upwards is 1,960 N.
Learn more about Newton's second law here: brainly.com/question/3999427
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