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The SI unit of force is the? a. joule, b. kilogram, c. meter, d.newton


Which of the following relationship is correct? a. N=1kg, b. N=1kg m, c.1N=1kg m/s, d.1N=1kg m/s2

1N=1kg m/s2

When an unblalanced force acts on an object? a. the object's motion does not change, b.the object accelerates, c. the weight of the object decreases, d. the inertia of the ongect increases

the objects accelerates

When a pair of balanced forces acts on an object, the net force that results is? a. greater in size than both forces combined, b. greater in size than one of the forces, c. equal in size to one of the forces, d.equal to zero

equal to zero

What kind of friction occurs as a fish swims through water? a. fluid, b. rolling, c.sliding, d. static


As you push a cereal box across a tabletop, the sliding of friction acting on the cereal bos? a. acts in the direction of motion, b. equals the weight of the box, c. is usually greater than static friction, d.acts in the direction oppsite of motion.

acts in the direction oppsite of motion

The force acting on a falling leaf are...? a. air resistance and fluid friction, b.gravity and air resistance, c. gravity and static friction, d. weight and rolling friction

gravity and air resistance

An open patachute increases air resistance of a falling sky diver by...? a. dereasing the weight of the diver, b.increasing surface area, c. increasing the terminal velocity, d. reducing fluid friction

increasing surface area

Figure 12-1 shows the motion of three balls.The curved paths followed by ball B and C are examples of...? a. centripetal motion, b. constant motion, c. linear motion, d.projectial motion

projectil motion

Projectile motion is caused by...? a. the downward force of gravilty, b. an initial foward velocity , c. a final vertical velocity, d.the downward force of gravity and an initial foward velocity

the downward force of velocity of gravity and an initial foward velocity

The property of matter that resisits changes in motion is called? a. friction, b. gravity, c.inertia, d. weight


An orange might roll off your cafeteria tray when stop suddenly because of...? a. the balanced forces acting on the orange, b. the centripetal force acting on the orange, c. the friction forces action on the orange, d.the orange's inertia

the orange's inertia

According to Newton's second law of motion, the acceleration of an object equals the net forces acting on the object divided by the object's...? a.mass, b. momentum, c. velocity, d. weight


If a force of 12 N is applied to an object with an mass of 2kg, the object will accelerate at...? a. 0.17m/s2, b. 24 m/s2, c.6m/s2, d.12 m/s2


your weight equal your? a. mass, b. mass didided by the net force acting on you, c.mass times the acceleration due to gravity, d. mass times your speed

mass times the acceleration due to gravity

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