2. Dynamics
Newton's Third Law — Quiz
Test your understanding of newton's third law with 5 practice questions.
Practice Questions
Question 1
A block of mass $m$ is placed on a frictionless inclined plane with an angle of inclination $\theta$. If the block is released, what is the magnitude of the normal force exerted by the inclined plane on the block?
Question 2
Two objects of masses $m_1$ and $m_2$ are connected by a massless string passing over a frictionless pulley. If $m_1 > m_2$, what is the tension in the string when the system is released?
Question 3
A person pushes a box of mass $M$ across a horizontal surface with a constant applied force $F_{\text{app}}$. If the coefficient of kinetic friction between the box and the surface is $\mu_k$, what is the magnitude of the force exerted by the box on the person?
Question 4
Two blocks, with masses $m_1$ and $m_2$ ($m_1 > m_2$), are in contact on a frictionless horizontal surface. A horizontal force $F$ is applied to $m_1$. What is the magnitude of the force that $m_1$ exerts on $m_2$?
Question 5
A car of mass $m_c$ collides head-on with a truck of mass $m_t$ ($m_t > m_c$). During the collision, which of the following statements is true regarding the magnitudes of the forces they exert on each other?