Answer:
they meet from the girl's original position at: 2.37 (meters)
Explanation:
We need to use the Newton's law, exactly the second law that relate force, mass and acceleration as: with this we can get both accelerations; solving for acceleration . Now and. Then knowing that they both travel at the same time and assuming that the distance among the girl and the sled is: 15.0-x, so, and, solving for the time we get: and with this equations we solving for the x that is the distance between the girl and the sled after the apply the force and we get:. Finally we get: and replacing the values we have got: so so x=2.37 (meters).
b. Rubber tape
c. Cotton tape
d. Plastic tape
Answer:
Explanation:
the answer is rubber tape not friction tape
b. Yes, the force applied is parallel to the direction of motion.
c. No, the force applied is perpendicular to the direction of motion.
d. Yes, the force applied is perpendicular to the direction of motion.
Answer:
No, the force applied is perpendicular to the direction of motion.
Explanation:
Work done is given by :
F = force
d = displacement
= angle between force and displacement
Work is positive when the force and the displacement are in same direction. Work is negative when the force and the displacement are in opposite direction. When the force and displacement are perpendicular to each other, no work is done.
If we carry a book across the room at a constant velocity, the work done is zero. This is because our weight is acting vertically downward and we are moving forward. The angle between the force and the displacement is 90. So, no work is done.
Hence, the correct option is (c) "No, the force applied is perpendicular to the direction of motion".
B. Water molecules move from their fixed position.
C. Water molecules lose energy.
D. The temperature of the ice increases as it melts.
The answer for this question is part B that is Water molecules move from their fixed position.
This is because when water is freeze it is in a solid condition that means the molecules are held together tightly and are are vibrating in their fixed positions.
As soon as the molecules gain energy they start to move around from their fixed positions and turn into a liquid.
In the process of doing so ice melts and becomes water.
Answer:
The acceleration of the box is 2.
Explanation:
According to Newton's second law of motion, the acceleration of any object will be directly proportional to the net unbalanced force acting on the object and inversely proportional to the mass of the object.
Net force = Mass × Acceleration
So
Since in this case, the box is experiencing a force from east of magnitude 27 N and resisting force of about 17 N from west. So the net force will be the difference of acting and reacting force.
Net force = 27-17 = 10 N.
Thus,
So 2 is the acceleration of the box. Thus the magnitude of acceleration of the box is 2.