students2 said:Nope, never really
students2 said:Mass isn't given but velocity is going to be higher to reach 57 kmph from 27 kmph, right?
Do you mean that velocity is higher at 54 kmph than at 27 kmph? Yes, that is correct. In English is you say "higher" , you need to compare two things. It doesn't make sense to say that 54 is "higher" unless you tell about another thing..students2 said:I mean, isn't velocity going to be higher when driving at 54 kmph?
So, if the velocity doesn't changes (value stays the same) and E=½mv2 is the equation, then, change in kinetic energy also is the same?
Stephen Tashi said:Do you mean that velocity is higher at 54 kmph than at 27 kmph?
students2 said:So, if I put that unknown velocity value in equation as v2, change in kinetic energy (E) from 27 to 54 is also going to be higher versus 0 to 27?
Stephen Tashi said:If you compute the kinetic energy at the three known velocities, 0, 27, and 54, you can compute the change in kinetic energy beween 0 and 27 and the change in kinetic energy between 27 and 54.
students2 said:Yup, i just made all calculations. (I used meters per second instead of km's per hour). I am not going to write it down, but I calculated that accelerating from 27 kmph to 54 kmph will use more KE versus 0 to 27. So, if we equalize KE to work, than car must do more work going from 27 to 54, right?
The amount of work done by a car depends on the distance it travels and the force required to overcome any resistance, such as friction or air resistance. Therefore, a car will have to do more work if it travels a longer distance or encounters greater resistance.
Kinematics is the study of motion, and it can affect the work done by a car in several ways. For example, if the car is accelerating or decelerating, it will require more work due to the change in velocity. Additionally, if the car is moving at a constant velocity, it will only have to overcome the resistance, such as friction or air resistance, to maintain its speed.
The weight of the car, or its mass, does not directly impact the work it must do. However, a heavier car will require more force to accelerate or maintain a certain speed, which in turn will require more work to be done. This is because the force needed to overcome resistance is directly proportional to the mass of the object.
Yes, the work done by a car can be negative if the car is decelerating or moving in the opposite direction of the applied force. In this case, the car is actually doing work on the environment, such as slowing down or reversing direction.
The surface on which a car is driving can impact the work it must do in several ways. For example, a rough surface will create more resistance, requiring the car to do more work to maintain its speed. On the other hand, a smooth surface will create less resistance, resulting in less work being done by the car. Additionally, the slope of the surface can also affect the work done by the car, as it may require more or less force to overcome the incline.