Review Physics Texas 6A/B/C/D/E/G

Which of the following is the best evidence that work has been done on or by an object?

• The energy of the object has changed

• The velocity of the object remains constant

• The mass of the object has changed

• The direction the object is moving remains constant

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Bud, a very large man of mass 130 kg, stands on a pogo stick. How much work is done as Bud

compresses the spring of the pogo stick 0.50 m?

• 65 J

• 56 J

• 736 J

• 637 J

Tags

NGSS.HS-PS3-1

After finishing her physics homework, Jane pulls her 50.0 kg body out of the living room chair

and climbs up the 5.0 m high flight of stairs to her bedroom. How much work does Jane do in

ascending the stairs?

• 250 J

• 2450 J

• 49 J

• 4900

Tags

NGSS.HS-PS3-1

A warehouse employee is pushing a 30.0 kg desk across a floor at a constant speed of 0.50 m/s. How much work must the employee do on the desk to change the speed to 1.00 m/s?

• 3.75 J

• 7.50 J

• 8.44 J

• 11.3 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A 5.000 kg crate is accelerated from 5.000 m/s to 10.00 m/s. What is the amount of work needed to accelerate the crate, to the nearest tenth of a joule?

How many ways can you find work? W=Fd and

$\Delta$ KE = W   Remember.. to the the change in something compute it for the initial senario and then the second and substract.

• 25.0

• 245.0

• 187.5

• 62.5

Tags

NGSS.HS-PS3-2

A student releases a ball from a height of 1.5 m above the floor.

Which of the following statements best describes the energy of the ball as it falls?

• Its potential energy is changed to kinetic energy

• The total amount of its mechanical energy increases

• Its kinetic energy is changed to potential energy

• The total amount of its mechanical energy decreases

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A skateboarder travels back and forth on a U-shaped track during a time trial at a competition. The graph shows the skateboarder's speed as a function of time during the trial.

Which labeled point on the graph identifies the time during the trial that the skateboarder most likely has equal amounts of kinetic energy and potential energy?

• P

• Q

• R

• S

Tags

NGSS.HS-PS3-1

What is the impulse on a 45,000 kg airplane when it changes its velocity from 242 m/s to 258 m/s?

• 16 kg m/s

• 2,800 kg m/s

• 440,000 kg m/s

• 720,000 kg m/s

Tags

NGSS.HS-PS2-2

A student pushed a box 27.0 m across a smooth, horizontal floor using a constant force of 113 N. If the force was applied for 9.00 s, how much power was developed, to the nearest watt? Remember, 1 Watt = 1 J/s

• 3050

• 339

• 37.7

• 1017

Tags

NGSS.HS-PS3-1

A pendulum swings back and forth along the dashed path shown in the diagram. Its instantaneous velocity for the location shown is given in the diagram.

What is the pendulum's total mechanical energy at the given location with respect to the bottom of the swing?

• 3.2 x 10^-2 J

• 8.8 x 10^-2 J

• 1.2 x 10^-1 J

• 2.1 x 10^-1 J