H2GM - Every Question Matters. Logo

In Physics / Middle School | 2014-10-22

A car with a mass of 1000 kg is traveling at a constant speed of [tex]10 \, \text{m/s}[/tex]. Neglecting any friction, how much force will the engine have to supply to maintain this speed?

Asked by Anonymous

Answer (2)

Without friction, NO FORCE is required to keep a moving object moving at a constant speed in a straight line.
Force CHANGES speed or direction. If neither speed nor direction changes, then there's no force acting on the object.

Answered by AL2006 | 2024-06-10

In a frictionless environment, no force is required to maintain a constant speed. Therefore, the engine must supply 0 N of force to keep the car moving at 10 m/s. This is because an object in motion stays in motion unless acted upon by an external force.
;

Answered by AL2006 | 2025-05-19

Related Questions in Physics

[Open]Which best explains what happens when an electron moves from an excited state to the ground state? A. The electron absorbs energy as it moves to a lower energy level. B. The electron absorbs energy as it moves to a higher energy level. C. The electron releases energy as it moves to a higher energy level. D. The electron releases energy as it moves to a lower energy level.

[Open]Particle A has very little mass in comparison to Particle B. Both particles are in the same atom. Which is the best conclusion about Particles A and B? A. They have the same charge. B. They are located in the nucleus together. C. Particle A has a positive charge, and Particle B is neutral. D. Particle A orbits the nucleus, and Particle B is located in the nucleus.

[Open]Light of wavelength [tex]$5 \times 10^{-7} m$[/tex] falls on a sensitive metal plate with photoelectric work function 1.90 eV. Find the kinetic energy of the photoelectrons emitted and the stopping potential. (given [tex]$h =6.62 \times 10^{-34} Js$[/tex])

[Open]Taden has found a table of the atmospheric layers of the Sun. However, he can't make out the names of the layers in the chart. [tex] \begin{tabular}{|l|l|l|l|} \hline & \multicolumn{1}{|c|}{ A } & \multicolumn{1}{c|}{ B } & \multicolumn{1}{c|}{ C } \\ \hline Position & Lowest & Middle & Outermost \\ \hline Thickness & 100 km & 2000 km & Millions of kilometers \\ \hline Temperature & 5,500 & 6,000 to 20,000 & $2,000,000$ \\ \hline \end{tabular} [/tex] What are the names of the Sun's layers described in columns A, B, and C? A. Corona; B: Photosphere; C: Chromosphere B. Core; B: Chromosphere; C: Photosphere C. Chromosphere; B: Corona; C: Core D. Photosphere; B: Chromosphere; C: Corona

[Open]Charges of +5 C and -9 C are at a distance of 1 m from each other. Which diagram represents the force between the two charges?