Newton's First Law (Translational Equilibrium)

AP Physics 1· difficulty 3/5

A 1.0 kg1.0~\text{kg} and a 4.0 kg4.0~\text{kg} block connected by a string on a frictionless surface are pulled by a 25 N25~\text{N} force on the 4 kg4~\text{kg} block. What is the string tension?

  • A

    20 N20~\text{N}

  • B

    25 N25~\text{N}

  • C

    10 N10~\text{N}

  • D

    5 N5~\text{N}

    check_circle

Explanation

System: a=25/5=5 m/s2a = 25/5 = 5~\text{m/s}^2. Isolate 1 kg1~\text{kg} block: T=ma=(1)(5)=5 NT = m a = (1)(5) = 5~\text{N}.

Want 10 more like this — adaptive to your weak spots?

Related questions