Physics and Safety Multiple Choice Questions

A 75 kg football player running at 8 m/s collides with a stationary 82 kg player. What is the initial momentum of the moving player?

• 600 kg·m/s

• 525 kg·m/s

• 450 kg·m/s

• 675 kg·m/s

Tags

NGSS.HS-PS2-2

Which safety features in a car increases the collision time to reduce force during an accident?

• Windshield wipers and hazard lights

• Windshield safety glass and child proof locks

• airbags and crumple zones

• headlights and turn signals

Tags

NGSS.HS-PS2-3

A 5 N force is applied to a ball over 6 sec. What is the impulse on the ball?

• 2.5 Ns

• 10 Ns

• 30 Ns

• 45 Ns

Tags

NGSS.HS-PS2-1

What velocity must a 0.53 kg softball be moving at if it has an impulse 21 N·s?

• 11.14 m/s

• 0.025 m/s

• 39.8 m/s

• 15.4 m/s

Tags

NGSS.HS-PS2-1

A 2kg cart has a momentum of 10 kg m/s. What is its velocity?

• 22 m/s

• 0.2 m/s

• 5.0 m/s

• 20 m/s

Tags

NGSS.HS-PS2-2

What type of charging occurs when a balloon is rubbed against fur or hair?

• Induction

• Triboelectric charging

• Polarization

• Conduction

Two similar metal spheres, A and B, have charges of +2.0 × 10⁻⁶ coulomb and +1.0 × 10⁻⁶ coulomb, respectively. The magnitude of the electrostatic force on A due to B is 2.4 newtons. What is the magnitude of the electrostatic force on B due to A?

• 1.2 N

• 2.4 N

• 4.8 N

• 9.6 N

Tags

NGSS.HS-PS2-4

The centers of two conducting spheres, A and B, are separated by a distance of 2 meters. Sphere A has a charge of +2 × 10⁻⁴ coulomb, and sphere B has a charge of +6 × 10⁻⁴ coulomb. What is the force that these two spheres exert on each other?

• 3.0 × 10⁻⁸ N

• 2.7 × 10² N

• 5.4 × 10² N

• 9.0 × 10⁹ N

Tags

NGSS.HS-PS2-4

Which switches must be closed to produce a current in conductor AB?

• 1, 2, and 3

• 2 and 3

• 1 and 4

• 2, 3, and 4

Tags

NGSS.MS-PS2-3

If the current in a wire is 2.0 amperes and the potential difference across the wire is 10. volts, what is the resistance of the wire?

• 5.0 ohms

• 8.0 ohms

• 12 ohms

• 20. ohms