Robotics Week 3 NPTEL Assignment Answers 2025

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✅ Subject: Robotics
📅 Week: 3
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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NPTEL Robotics Week 3 Assignment Answers 2025

Answer : See Answers

2. Which one of the following statements about the rotation matrix is FALSE ?

d. Each row/column of a rotation matrix is a unit vector.

Answer :

Answer :

4. Cartesian coordinate system can be used to represent

a. the position of end-effector only of a manipulator with respect to its base coordinate system.
b. the orientation of end-effector only of a manipulator with respect to its base coordinate system.
c. both the position and orientation of end-effector of a manipulator with respect to its base coordinate system
d. neither the position nor orientation of end-effector of a manipulator with respect to its base coordinate system

Answer :

5. According to Denavit-Hartenberg’s notations, length of ith link, that is, ai is defined as

a. mutual perpendicular distance between two consecutives X axes.
b. mutual perpendicular distance between two consecutives Z axes.
c. mutual perpendicular distance between two consecutives Y axes.
d. can never be equal to zero.

Answer :

6. According to Denavit-Hartenberg notations, link-offset, that is, di is defined as

a. the distance between two consecutives Y-axes measured along Z-axis.
b. the distance between two consecutives Z-axes measured along X-axis.
c. the distance between two consecutives X-axes measured along Z-axis.
d. the distance between two consecutives Z-axes measured along Y-axis.

Answer : See Answers

7. According to Denavit-Hartenberg’s notation, angle of twist of ith link, that is, αi is defined as

a. the angle between two consecutive Z axes measured about X axis.
b. the angle between two consecutive X axes measured about Y axis.
c. the angle between two consecutive X axes measured about Z axis.
d. the angle between two consecutive Y axes measured about Z axis.

Answer :

8. According to Denavit-Hartenberg notations, joint angle (θ_i) is defined as

a.the angle between two consecutives Y axes measured about Z axis.
b. the angle between two consecutives Y axes measured about X axis.
c. the angle between two consecutives X axes measured about Z axis.
d. the angle between two consecutives Z axes measured about X axis.