The answer is 48Kmh because it is 120km divided by 2.5 or 2 and a half hours
Answer:
The answer is 18 N.
Explanation:
A force can be divided into components x and y components. The component along the x-axis is called the horizontal component and along the y-axis is called the vertical component. In this case, as the force is in a horizontal direction and is also known as x-component of force. The x- component of force is
Fx = Fcosθ
Fx = 22(cos 35°)
Fx = 22 x 0.819
Fx = 18 N
Child's horizontal pull forces are equal to that of frictional resistance force on the wagon.
Answer:
C. Takes heat in, does work, and loses energy heat.
Explanation:
Heat engine is a system makes use of thermal energy (heat) to in order to do mechanical work.
This occurs by converting the heat into mechanical energy. This energy is then used to do work.
The key characteristic of a heat engine is that the substance with which work is done by, goes from a higher temperature to a lower temperature.
Hence, it loses heat as it does work.
Answer:
A. 30 m/s
D. 15 kilometers
Explanation:
Vector quantities have both magnitude and direction. Among the provided choices, B and C are scalar quantities as they have no direction.
30 m/s is the magnitude for velocity, a derivative of displacement.
15 kilometers is the metric magnitude (10³m) for displacement.