Draw a vector for a force of 69 N @ 76 degrees
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Answer:
The force is shown in the figure below which is 69 N at 76° from the positive x-axis
there are two component Fx and Fy which are in the direction of x-axis and y-axis.
76=
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Help?? When vibrational motion in an object increases, which is a true statement? A. Kinetic energy and temperature decrease; thermal energy increases. B. Kinetic energy, temperature, and thermal energy decrease. C. Kinetic energy and temperature increase; thermal energy decreases. D. Kinetic energy, temperature, and thermal energy increase. i think its D, but im not sure.
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Assuming the initial direction of motion before impact as negative and final direction of motion as positive.
m = mass of the ball being hit = 0.15 kg
v₀ = initial velocity of the ball before the impact = - 36 m/s
v = final velocity of the ball after impact = 45 m/s
t = time of impact = 0.0020 s
F = force Reggie exerted on the ball
Using Impulse-change in momentum equation
F t = m (v - v₀)
F (0.0020) = (0.15) (45 - (- 36))
F = 6075 N
B. pulley
C. wedgd
D. inclined plane
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Final answer:
The inclined plane is the best simple machine to assist with moving heavy objects into a truck. It allows for less force to be used by distributing the required force over a longer distance.
Explanation:
The simple machine that is best suited to assist with the task of moving heavy objects into a moving truck 1.5 meters above the ground is the inclined plane (option D).
An inclined plane is a flat surface that is inclined or sloped, which allows us to move objects up or down with less force. By using an inclined plane such as a ramp, we can reduce the amount of force needed to lift the heavy objects into the truck.
For example, instead of trying to lift a heavy object straight up into the truck, which would require a significant amount of force, we can use an inclined plane to gradually raise the object by pushing it up the inclined surface. This allows us to distribute the required force over a longer distance, making it easier to move the object.
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B. The mass of the balloon increases because the temperature of the balloon has increased.
C. The mass of the balloon stays the same because the gas inside the balloon still has same mass after it warms up.
D. The mass of the balloon stays the same because warming decreases the mass enough to cancel out the effect of increasing the size.
Please explain why you chose your answer
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B). No. Same reason as (A).
C). Yes. The total amount of mass never changes, no matter what you do to it.
D). No. The amount of mass never changes, no matter what you do to it.
Heterogeneous mixture
Element
Compound
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How is this different from a distance-time graph?
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Answer:
its devavtion is different from the distance changes process
Explanation:
Final answer:
A speed-time graph and a distance-time graph represent different aspects of motion. A horizontal line on the former indicates a constant speed (zero acceleration), while a straight, upward-diagonal line on the latter shows constant speed. A flat horizontal line on a distance-time graph shows no movement.
Explanation:
A speed-time graph and a distance-time graph each depict different aspects of motion. A horizontal line on a speed-time graph does indeed indicate constant speed or zero acceleration; the object is moving at a constant speed. However, a distance-time graph shows how the position of the object changes over time.
Let's take an example. If a car is traveling at a constant speed, on a speed-time graph, this would be represented by a horizontal line. The height of the line above the time axis represents the constant speed.
On a distance-time graph, a car moving at constant speed will be represented by a straight line with a positive slope. This is because the position of the car is continuously changing (it's covering distance), and at a constant rate. The slope of the distance-time graph gives us the speed of the car.
So, while a flat horizontal line in a speed-time graph indicates constant speed, a flat horizontal line in a distance-time graph would indicate no change in position, i.e., the object is not moving at all.
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