Work

A force exerted over a distance to move an object is ______________________.

• power
• work
• momentum
• Watt

 Work done = Force x _________

• a. distance
• b. acceleration
• c. velocity
• d. speed

A 5000N block is lifted 10 m. How much work was done?

• 50,000 J

• 5,000 J

• 500 J
• 50 J

Two factors that determine work are...

• Force

• Mass

• Velocity

• Distance

Units of work are...

• Newtons

• Grams

• Joules

• Meters

If you push a cart with a force of 60 N for 2 m... how much work have you done?

• 120 J

• 30 J

• 120 N

• 30 N

A rope is used to pull a metal box a distance of 15.0 m across the floor. The rope is held at an angle of 46 degrees with the floor, and a force of 628 N is applied to the rope. How much work does the rope do on the box.

• 6.54 x 10^{3 N}

• 6.77 x 10^{3 J}

• 5.34 x 10³ J

• 6.54 x 10 ^{3 J}

When a force is applied at an angle to the direction of motion, the only work done is...?

• by the component of the force applied in the direction of he displacement.

• by the component of the force pushing downward

• by the force of friction between the object and the ground

• by the component of the force applied perpendicular to the direction of the displacement.

Work done when you raise a load up with the help pf a Pulley

• Positive

• Negative

• Zero

If the direction of an applied force is anti-parallel (opposite) to the direction an object is moving:

• Negative work is done.

• Positive work is done.

• No work is done.