Kiểm Tra Giữa Kì II Môn Vật Lý 10

A force with magnitude F and the arm length with respect to the fixed rotation axis is d. What is the formula for calculating the moment of force M with respect to this rotation axis?

• M = F * d

• M = F / d

• M = F + d

• M = F - d

In which of the following cases does the force act to make the rigid body rotate around the axis?

• A force parallel to the rotation axis.

• A force that intersects the rotation axis.

• A force that lies in a plane perpendicular to the rotation axis and intersects the rotation axis.

• A force that lies in a plane perpendicular to the rotation axis and does not intersect the rotation axis.

Choose the correct answer. The arm of the force is

• the distance from the rotation axis to the line of action of the force.

• the distance from the rotation axis to the point of application of the force.

• the distance from the object to the line of action of the force.

• the distance from the rotation axis to the object.

The unit of moment of force is

• m/s

• N.m

• kg.m

• N.kg

The moment of force acting on an object is a quantity that

• characterizes the effect of the force in rotating the object.

• is a vector.

• is used to determine the magnitude of the acting force.

• always has a positive value.

Choose the correct answer.

• A couple is a system of two parallel forces, in the same direction, with equal magnitudes acting on an object.

• A couple is a system of two parallel forces, in opposite directions, with equal magnitudes acting on an object.

• A couple is a system of two parallel forces, with equal magnitudes acting on an object.

• A couple is a system of two parallel forces, in opposite directions, with equal magnitudes acting on two objects.

Which of the following tools is not included in the practical exercise of force composition?

• Steel board, force gauge.

• Protractor, magnet base.

• Measuring tape, thermometer.

• Force gauge, marking pen.

Which of the following operations is not included in the practical exercise of force composition?

Which operation is not included in the practical exercise of force synthesis?

• Record the data of two forces F1, F2 from the readings of two force meters.

• Record the angle ∝ between two forces F1, F2 using a protractor.

• Attach the protractor to the board using a magnet.

• Record the data of two forces F1, F2 from the readings of two ammeters.

In the experiment of synthesizing two concurrent forces, when moving the force meter, it must ensure that the segments of the string and rubber band always lie

• on the same plane.

• on two perpendicular planes.

• on two arbitrary planes.

• on two parallel planes.