Complete Question
The complete question is shown on the first uploaded image
Answer:
The value is
Explanation:
From the question we are told that
The mass of the block is
The initial speed of the block before entering the rough section is
The time taken is t = 0.5 s
The speed with which the block leaves the rough section is
Generally from kinematic equation
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Generally the magnitude of the average frictional force is mathematically represented as
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The negative sign show that the force is acting in the opposite direction to the direction of motion of the block
Answer:
Explanation:
According to Newton's Second Law of Motion, force is the product of mass and acceleration.
The net force is 5 Newtons and the mass is 13 kilograms. Let's convert the units for force to make the problem and unit cancellation easier.
- 1 Newton (N) is equal to 1 kilogram meter per square second (1 kg*m/s²)
- The net force of 5 N is equal to 5 kg*m/s²
Now we know the values for 2 variables:
Substitute the values into the formula.
Since we are solving for the accleration we must isolate the variable, a. It is being multiplied by 13 kilograms and the inverse of multiplication is division. Divide both sides by 13 kg
The units of kilograms (kg) cancel.
The original measurements of force and mass ( 5 and 13) have 1 and 2 significant figures. We must round our answer to the least number of sig figs: 1.
For the number we found, that is the tenths place. The 8 in the hundredth place (0.384615385) tells us to round the 3 up to a 4.
The acceleration is approximately <u>0.4 meters per square second.</u>
In this situation, Superman moves faster than the asteroid. Velocity involves both magnitude and direction.
Velocity refers to a physical vector, which is defined by the magnitude and direction of a given object.
The absolute value of velocity is known as speed, and it can be calculated as the rate of change of the position of an object with respect to a point of reference.
The absolute value of velocity is always a function of time.
Learn more about velocity in:
brainly.com/question/2548537
Answer: Real image
Explanation:
converging lens will only produce a real image if the object is located beyond the focal point (i.e., more than one focal length away).
<h3><u>Answer</u>;</h3>
Decrease
<h3><u>Explanation</u>;</h3>
- Chemical reaction may be either endothermic or exothermic based on whether they use heat energy or release it to the surroundings.
- An endothermic reaction occurs when the temperature of an isolated system decreases while the surroundings of a non-isolated system gains heat.
- In endothermic reactions the temperature of the surroundings decreases.