Understanding "Uniform Motion" and "Relative Speed" is crucial for students preparing for school and competitive exams. These concepts form the foundation of kinematics in physics and are frequently tested through MCQs and objective questions. Practicing these questions not only enhances conceptual clarity but also boosts your confidence, helping you score better in exams.
What You Will Practise Here
Definitions and characteristics of uniform motion
Understanding relative speed and its applications
Key formulas related to uniform motion and relative speed
Graphical representation of motion
Solving problems involving two or more moving objects
Conceptual questions that link theory with practical scenarios
Important questions that frequently appear in exams
Exam Relevance
The topics of uniform motion and relative speed are integral parts of the physics syllabus for CBSE, State Boards, NEET, and JEE. Students can expect questions that assess their understanding of motion concepts, often presented in the form of numerical problems or conceptual MCQs. Common question patterns include calculating speeds, determining distances, and analyzing motion graphs, making it essential to master these topics for effective exam preparation.
Common Mistakes Students Make
Confusing uniform motion with accelerated motion
Misunderstanding the concept of relative speed when multiple objects are involved
Neglecting to apply the correct formulas in problem-solving
Overlooking the significance of direction in relative speed calculations
Failing to interpret motion graphs accurately
FAQs
Question: What is uniform motion? Answer: Uniform motion refers to the motion of an object moving at a constant speed in a straight line.
Question: How do I calculate relative speed? Answer: Relative speed is calculated by adding or subtracting the speeds of two objects depending on their direction of motion.
Now is the time to enhance your understanding of these concepts! Dive into our practice MCQs and test your knowledge on Uniform Motion and Relative Speed. Every question you solve brings you one step closer to exam success!
Q. Two cars start from the same point and travel in opposite directions. Car A travels at 70 km/h and Car B at 90 km/h. How far apart will they be after 1 hour?
A.
160 km
B.
150 km
C.
140 km
D.
130 km
Solution
Distance apart = (Speed of A + Speed of B) × Time = (70 km/h + 90 km/h) × 1 h = 160 km.
Q. Two cars start from the same point and travel in opposite directions. Car A travels at 70 km/h and Car B at 90 km/h. How far apart will they be after 2 hours?
A.
320 km
B.
340 km
C.
360 km
D.
380 km
Solution
Relative speed = 70 km/h + 90 km/h = 160 km/h. Distance apart after 2 hours = 160 km/h × 2 h = 320 km.
Q. Two cyclists start from the same point and ride in opposite directions. Cyclist A rides at 12 km/h and Cyclist B at 16 km/h. How far apart will they be after 1.5 hours?
A.
42 km
B.
48 km
C.
54 km
D.
60 km
Solution
Distance apart = (Speed of A + Speed of B) × Time = (12 km/h + 16 km/h) × 1.5 h = 42 km.
Q. Two cyclists start from the same point and ride in the same direction. Cyclist A rides at 12 km/h and Cyclist B at 15 km/h. How long will it take for Cyclist B to be 9 km ahead of Cyclist A?
A.
3 hours
B.
4 hours
C.
5 hours
D.
6 hours
Solution
Relative speed = 15 km/h - 12 km/h = 3 km/h. Time = Distance / Speed = 9 km / 3 km/h = 3 hours.
Q. Two cyclists start from the same point and ride in the same direction. Cyclist A rides at 12 km/h and Cyclist B at 15 km/h. How far apart will they be after 2 hours?
A.
3 km
B.
4 km
C.
5 km
D.
6 km
Solution
Relative speed = 15 km/h - 12 km/h = 3 km/h. Distance apart = Relative speed × Time = 3 km/h × 2 h = 6 km.
Q. Two cyclists start from the same point and ride in the same direction. Cyclist A rides at 10 km/h and Cyclist B at 15 km/h. How far apart will they be after 2 hours?
A.
5 km
B.
10 km
C.
15 km
D.
20 km
Solution
Relative speed = 15 km/h - 10 km/h = 5 km/h. Distance apart = Relative speed × Time = 5 km/h × 2 h = 10 km.