Elastic and Inelastic Collisions AP Physics 1 MCQ – Exam Style Questions etc.
Elastic and Inelastic Collisions AP Physics 1 MCQ
Unit 4: Linear Momentum
Weightage : 10-15%
Exam Style Practice Questions, Elastic and Inelastic Collisions AP Physics 1 MCQ
Question
An object is moving to the west at a constant speed. Three forces are exerted on the object. One force is \(10 \mathrm{~N}\) directed due north, and another is \(10 \mathrm{~N}\) directed due west. What is the magnitude and direction of the third force if the object is to continue moving to the west at a constant speed?
(A) \(10 \sqrt{3} \mathrm{~N}\), directed northwest
(B) \(10 \sqrt{3} \mathrm{~N}\), directed southeast
(C) \(10 \sqrt{2} \mathrm{~N}\), directed northwest
(D) \(10 \sqrt{2} \mathrm{~N}\), directed southeast
▶️Answer/Explanation
Ans:D
Question
Block \(A\) of mass \(2.0 \mathrm{~kg}\) is released from rest at the top of a \(3.6 \mathrm{~m}\) long plane inclined at an angle of \(30^{\circ}\), as shown in the figure above. After sliding on the horizontal surface, block \(A\) hits and sticks to block \(B\), which is at rest and has mass \(3.0 \mathrm{~kg}\). Assume friction is negligible. The speed of the blocks after the collision is most nearly
(A) \(2.4 \mathrm{~m} / \mathrm{s}\)
(B) \(3.2 \mathrm{~m} / \mathrm{s}\)
(C) \(3.8 \mathrm{~m} / \mathrm{s}\)
(D) \(6.0 \mathrm{~m} / \mathrm{s}\)
▶️Answer/Explanation
Ans:A