Science 7 Periodical Exam

Which of the following is an accurate representation of 15 N, East?

• 15 N

• 15 N

• 15 N

• 15 N

What is the orientation of the force of gravity?

• always directed upward

• always parallel to the normal force

• always directed downward

• always perpendicular to the surface

Calculate the net force: 8 N to the right and 19 N to the left.

Which of the following situations is/are balanced force/s?

• a car moving at a constant speed

• a rolling ball

• a book resting on a desk

• a falling apple

When the net force acting on a moving object is zero, the object______________.

• moves at constant speed

• moves at varying speed

• moves in constant direction

• moves with constant speed and direction

Which is true about the following situations? I. A girl is measuring his path, 30 meters. II. A girl is measuring his path, 30 meters, South.

• I is displacement and II is distance.

• I and II are both displacements.

• I is distance and II is displacement.

• I and II are both distances.

Which of the following is TRUE about an object that travels 10m to the right then 6m upward then another 10m to the left?

• The total distance travelled by the object is equal to 26m.

• The total distance travelled by the object is equal to 26m down.

• The displacement of the object is equal to 26m.

• The displacement of the object is equal to 6m down.

What is the motion of the object in this position-time graph?

• The object remains stationary.

• The object moves at a constant velocity.

• The object moves at a decreasing velocity.

• The object moves at an increasing velocity.

Which of the following objects is slowing down?

Heat flows from regions of _____ temperature to regions of _____ temperature.

• higher, higher

• lower, higher

• higher, lower

• lower, lower