Question

aside from the skid steering, friction in a robot is much more complicated and difficult to account for. at the wheels, static friction cannot be overcome, or else the robot will spin out. furthermore, static and kinetic friction are internal to the drive train and these are very difficult to quantify in terms of normal forces and coefficients of friction. often this type of friction can only be found indirectly.
true
false
question 8 (1 point)
friction was defined in section 3.12 as a force that acts on an object in order to slow the objects motion, countering the pushes or pulls that produce acceleration. when an object is moving at a constant speed, with zero acceleration, the push or pull is canceled by the frictional force.
true
false
question 9 (1 point)
torque can be described as the rotational \force\ that causes an object to spin. torque has been demonstrated through a seesaw and a lever. by extension, torque has been shown to act on and through gears or wheels.
true
false

Explanation:

• Question 8: According to Newton's first law, when an object moves at a constant speed (zero acceleration), the net force is zero. So, the applied force (push or pull) is balanced by the frictional force.
• Question 9: Torque is indeed the rotational equivalent of force. It causes rotation (spinning). Examples like seesaws (levers) and its action on gears/wheels are correct as torque is involved in rotational motion in these cases.

Answer:

Question 8: True
Question 9: True