A Level Physics

If two objects are moved to a distance 3 x further than they were before. How would the gravity force between them change?

• It would be 3x larger.

• It would be 1/3 as large

• It would be 1/9 as large

• It would be 9x larger

Tags

NGSS.HS-PS2-4

The discovery of the “Law of Universal Gravitation” is associated with:

• Robert Hooke

• Isaac Newton

• Edwin Hubble

• Galileo Galilei

Tags

NGSS.HS-PS2-4

According to the Law of universal gravitation, the force of gravitational attraction between a planet and an object located upon the planet’s surface depends upon ______________.

• the radius of the planet

• the mass of the object

• the mass of the planet

• All of the above

Tags

NGSS.HS-PS2-4

What is the gravitational force between two identical 50,000 kg asteroids whose centers of mass are separated by 1000 m?

• 2500 N

• 1.67 x 10^-4 N

• 1.67 x 10^-14 N

• 1.67 x 10^-7 N

Tags

NGSS.HS-PS2-4

What is the term used to describe the opposition that a device or material offers to the flow of direct current?

• Resistance

• Capacitance

• Inductance

• Conductance

What is the unit of electrical resistance?

• Volt

• Ampere

• Ohm

• Watt

Which of the following is a correct representation of Ohm's Law?

• All of the above

Which of the following statements about an object which performs simple harmonic motion is true?

• The acceleration is zero when the displacement is maximum.

• The velocity is maximum when the displacement is zero.

• The velocity is directly proportional to the displacement.

• The acceleration is positive when the displacement is positive.

A particle is in simple harmonic motion. The amplitude of the motion is 3.0 m and the frequency is 20 Hz. At time t=0, the displacement of the particle from the equillibrium position is x=+3.0 m. Which equation correctly represents the variation of displacement x with time t?

Tags

NGSS.HS-PS4-1

Which of the following statements is not true regarding a mass-spring system that moves with simple harmonic motion in the absence of friction?

• The total energy of the system remains constant.

• The total energy of the system is proportional to the square of the amplitude of oscillation.

• The energy of the system is continually transformed between kinetic of the mass and potential energy in the spring.

• The potential energy stored in the sprig is greatest when the mass passes through the equilibrium position.