Question

# Question 1: Mark True or False beside each statement below: _______(a) The center of mass (gravity)...

Question 1: Mark True or False beside each statement below:

_______(a) The center of mass (gravity) of any object must lie on a point within or on the body of each object.

_______(b) The torque due to a force is independent of the choice of axis of rotation.

_______(c) If the forces on an object balance, then this object cannot experience any rotation.

_______(d) If the torques on an object balance, then this object cannot have angular acceleration.

_______(e) If two spinning objects have the same angular momentum, they necessarily have the same rotational kinetic energy.

#### Homework Answers

Answer #1

[a] ans

ture the centre of mass of any object must lie on a point within or on the body of each object

[b] ans

true basing on system of paraticele and rotational dynamices , if the forces on an object balance ,then this obect cannot experience any rotation

[c]ans

false if the torques on an object balance ,then this object cannot have angular acceleration

because torque=inertia*angular acceleration

[d] ans

True .if two spinining object have same angular momentum the necessarily have the same rotational kinectic energy because the kinetic energy is independent on angular momentum

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