The motion of a car on a position-time graph is represented with a horizontal line. What does this indicate about the car’s motion? A. It’s not moving. B. It’s moving at a constant speed. C. It’s moving at a constant velocity. D. It’s speeding up. i dont know if ive asked this before if i have sorry
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Final answer:
A horizontal line on a position-time graph represents a stationary object or, in this case, a parked car. The car is not moving since there's no change in position over time. Speed or velocity would be depicted by the slope of the line on the position-time graph.
Explanation:
Your question pertains to understanding what a horizontal line on a position-time graph indicates about a car's motion. In the context of a position-time graph, a horizontal line suggests that the position of the car is not changing with respect to time, indicating option A: The car is not moving. The car being stationary means there is no change in position over time, hence the horizontal line on the graph.
Options B, C, and D suggest a change in position over time, which would be represented by a slanted line, not a horizontal one. Option B: 'moving at a constant speed' and Option C: 'moving at a constant velocity' would both produce a straight line with a slope, not a horizontal line. Option D: 'speeding up' would be represented by a curved line, showing acceleration.
In contrast, a stationary object or a car at rest is represented by a horizontal line on a position-time graph. Velocity or speed, on the other hand, is determined by the slope of the line on a position-time graph. Hence, a horizontal line, having no slope, signifies zero speed or velocity, indicating that the car is not moving.
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Explanation:
Units such as Kilogram, Mass and Time are said to be fundamental units because they are independent.
Differences between Mass and weight;
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b. When you speak normally, your voice sounds 4 times as loud as a whisper. How many decibels is this?
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The buoyant force on an object submerged in a fluid is equal to the density of the fluid it displaces.
According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid displaced by the object. The weight of the displaced fluid is directly proportional to the volume of the fluid displaced and the density of the fluid. So, the buoyant force (B) can be mathematically represented as:
B = ρ * V * g
Where:
ρ (rho) is the density of the fluid,
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g is the acceleration due to gravity.
The key point to remember is that the buoyant force acts in the opposite direction to gravity. If the object's weight is less than the buoyant force, it will float; if it is greater, it will sink.
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Answer:
If this helps, to work out the kinetic energy the formula is K (stands for kinetic energy) = 1/2 (half of) mass and velocity. So the answer is 450 joules.
Explanation:
Answers
Answer:
60J
Explanation:
friction is the opposition to the motion of an object. Before a body can be set in motion, part of the energy or work-done must be used to overcome friction.
While kinetic energy is the energy associated with a body due to its motion.
Since friction tends to oppose the motion of a body,when a body start to move, some of the energy applied to the body to cause its motion is converted to heat due to friction.
Hence if a work-done of 100J is applied to a body that requires 40J of the work to overcome friction, the total change in the kinetic energy can be expressed as