AP Physics C

Tags

NGSS.HS-PS2-1

The position of an object is given by the equation x = 3.0 t2 + 1.5 t + 4.5, where x is in meters and t is in seconds. What is the instantaneous acceleration of the object at t = 3.0 s?

• 3.0 m/s/s

• 6.0 m/s/s

• 9.0 m/s/s

• 19.5 m/s/s

• 36 m/s/s

Tags

NGSS.HS-PS2-1

The position of a toy locomotive moving on a straight track along the x-axis is given by the equation x = t³ – 6t² + 9t, where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to

• zero

• 2 s

• 3 s

• 4 s

• 5 s

Tags

NGSS.HS-PS2-1

The momentum p of a moving object as a function of time t is given by the expression p = kt³, where k is a constant. The force causing this motion is given by the expression

• 3kt²

• 3kt²/2

• kt²/3

• kt⁴

• kt⁴/4

Tags

NGSS.HS-PS2-1

For a particular nonlinear spring, the relationship between the magnitude of the applied force F and the resultant displacement x from equilibrium is given by the equation F = kx². What is the amount of work done by stretching the spring a distance x₀?

• kx₀³

• 1/2 kx₀

• 1/2 kx₀³

• 1/3 kx₀²

• 1/3 kx₀³

A 10-kg ghost is constrained to move along the x-axis. The potential energy U of the ghost is given as a function of its position by the function below. Calculate the force on the ghost at x = 3 m.

• 32 N

• -45 N

• 45 N

• -32 N

Tags

NGSS.HS-PS2-1

A bug begins to crawl up a vertical wire at time t = 0.  The velocity v of the bug at time t, 0 < t < 8, is given by the function whose graph is shown behind this text. At what value of t does the bug change direction? 

• 2

• 4

• 6.5

• 7

Tags

NGSS.MS-PS3-1

The position of a vehicle of mass 1000 kg moving on a straight track along the x-axis is given by the equation x(t)=t³ - t² - 6t  where x is in meters and t is in seconds. What is the instantaneous force acting on the vehicle at t = 3 s? 

• Zero

• 3000 N

• 6000 N

• 16000 N

Tags

NGSS.HS-PS2-1

A force given by F(x) = 6x + 3x² acts upon a projectile that starts from rest at the origin. How much work is done on the 5 kg projectile if it travels 5 m? 

• 155 J

• 175 J

• 200 J

• 225 J

Tags

NGSS.HS-PS3-1

A 50 kg car travels along a straight track along the x-axis according to the equation x(t) = t² + 4t + 5, where x is in meters and t is in seconds. What is the car’s kinetic energy after 1 s? 

• 900 J

• 1000 J

• 1500 J

• 2000 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2