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  1. Problems
  2. /Mechanics
  3. /Relative Motion

Relative Motion

Physics
+ Upload a Problem
More in MechanicsUnits and MeasurementMotion in a Straight LineRelative MotionVectors and Motion in a PlaneNewton's Laws of MotionFrictionWork, Energy and PowerMomentum and CollisionsCircular MotionGravitationRotational MotionElasticity and Mechanical Properties of SolidsPressure and FluidsFluid Flow, Bernoulli's Principle and ViscositySurface Tension and Capillarity
15 problems
Type:
1.
Car A drives east at 20 m/s, and car B drives north at 15 m/s.
High School (11–12) · Relative Motion, Vectors and Motion in a PlaneStemPy LabStemPy Lab
Medium
2.
A light aircraft flies at 240 km/h through the air.
High School (11–12) · Relative Motion, Vectors and Motion in a PlaneStemPy LabStemPy Lab
Hard
3.
On a still day, rain falls straight down at 9 m/s.
High School (11–12) · Relative Motion, Vectors and Motion in a PlaneStemPy LabStemPy Lab
Medium
4.
A boat moves at 4 m/s in still water. It crosses a river 80 m wide that flows at 2 m/s.
High School (11–12) · Relative Motion, Vectors and Motion in a PlaneStemPy LabStemPy Lab
Easy
5.
From a hot-air balloon hovering 64 m above a field, a man drops ball A.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Hard
6.
A cheetah at 28 m/s chases a gazelle running at 22 m/s in a straight line.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Medium
7.
A goods train 240 m long runs at 15 m/s on one track.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Medium
8.
A car moves at 28 m/s and a truck at 19 m/s on a straight highway.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Easy
9.
A lorry passes a checkpoint at 45 km/h. Eight minutes later, a car passes the same checkpoint at 72…
High School (11–12), High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Hard
10.
Object A moves at a steady 12 m/s. Object B starts from rest, gains 3 m/s every second, and keeps…
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Hard
11.
When is the relative velocity of two moving objects exactly zero?
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Easy
12.
A walkway 63 m long moves at 0.8 m/s. A traveller walks along it at 1.0 m/s, the same way.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Medium
13.
Train A is 150 m long at 54 km/h. Train B is 250 m long at 36 km/h.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Medium
14.
Train A goes at 90 km/h and train B at 63 km/h, the same way on parallel tracks.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Easy
15.
Car A leaves a town at a steady 36 km/h.
High School (11–12) · Relative Motion, Motion in a Straight LineStemPy LabStemPy Lab
Hard