Science STAAR Physics

A 1,000 kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2 m/s², which force is closest to the net force acting on the vehicle?

• -9,600 N

• -1,300 N

• -900 N

• -94 BN

Tags

NGSS.MS-PS2-2

The picture shows an aerialist walking on a tightrope and holding a balancing bar. An action-reaction pair of forces exists between -

• the aerialist's feet and the rope

• the rope and the balancing bar

• the two ends of the rope

• the aerialist's arms and legs

Tags

NGSS.MS-PS2-5

A marble is given potential energy by being placed at Location W. When the marble is released, it rolls down the track. At which location does the marble have maximum kinetic energy?

• Location W

• Location X

• Location Y

• Location Z

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Two forces are applied to a 17 kg box, as shown. The box is on a smooth surface. Which statement best describes the acceleration of the box?

• The box accelerates at 1.0 m/s² to the right because the net force is 17 N to the right.

• The box accelerates at 1.9 m/s² to the right because the greater force is to the right.

• The box accelerates at 3.0 m/s² because the combined forces cause the box to accelerate.

• The box does not accelerate, because neither force is large enough to move the box.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Four boxes are sliding with constant speed before each box experiences an unbalanced force of 8 N. Which box would experience the greatest acceleration when the unbalanced force is applied.

• The box with a mass of 2 kg.

• The box with a mass of 4 kg.

• The box with a mass of 6 kg.

• The box with a mass of 8 kg.

Tags

NGSS.MS-PS2-2

A block is pulled 0.90 m to the right in 2.5 s. What is the block's average speed to the nearest hundredth of a m/s?

• 3.60

• 36.0

• 0.361

• 0.36

Tags

NGSS.MS-PS3-1

A physics teacher performed a demonstration for a science class by pulling a crate across the floor and measuring the force with a spring scale. While she pulled, a student measured the acceleration of the crate with a handheld electronic device. The results of three trials are shown below. The teacher asked the class to calculate the acceleration of the crate based on the crate’s mass and the force she applied. What conclusion can be made about the difference between the calculated acceleration and the actual acceleration that occurred in the trials?

• Another force in the direction of the motion produced a lower acceleration than calculated.

• An opposing force caused by friction produced a lower acceleration than calculated.

• Another force in the direction of the motion produced a higher acceleration than calculated.

• An opposing force caused by friction produced a higher acceleration than calculated.

Tags

NGSS.MS-PS2-2

Which statement about stars is correct?

• Star formation begins in a nebula.

• White dwarfs become main-sequence stars when they gain mass.

• Supergiants are stars that can absorb black holes.

• Main-sequence stars are formed by comets.

Tags

NGSS.HS-ESS1-3

Which statement correctly describes the location and charge of the electrons in an atom?

• The electrons are inside the nucleus and have no charge.

• The electrons are outside the nucleus and have no charge.

• The electrons are inside the nucleus and have a negative charge.

• The electrons are outside the nucleus and have a negative charge.

A student models convection currents in a laboratory activity. How are the convection currents in the student's model different from the convection currents in Earth's atmosphere and oceans?

• The warm air in Earth's atmosphere and the warm water in Earth's oceans sink instead of rise.

• The heat source for Earth's atmosphere and oceans is the sun, which heats from above instead of below.

• Convection cells in Earth's atmosphere and oceans flow in the same direction instead of opposite directions.

• Cold air in Earth's atmosphere and cold water in Earth's oceans are less dense than warm air and warm water instead of being more dense.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6