Kinematics

In the projectile motion the velocity along the x axis is ...

• the same as the initial one

• zero

• depends on the acceleration

The instantaneous acceleration is ...

• the slope of the line tangent to the v-versus-t curve

• the slope of the line tangent to the x-versus-t curve

• the same as the average acceleration

Tags

NGSS.HS-PS2-1

The acceleration of the gravity is ...

• the acceleration of an object in free fall

• the acceleration of an object in free fall in absence of other forces

• the acceleration of an object sliding on ice

Tags

NGSS.HS-PS2-4

What is the formula to calculate displacement in one dimension when an object is in uniformly accelerated motion?

• Δx = (v_i + v_f) / 2 * t

• Δx = v_i t + (1/2) a * t^2

• Δx = v_i / t

Which of the following equations represents the kinematic equation for calculating an object's velocity as a function of time when it undergoes constant acceleration?

• v_f = v_i + at

• v_f = v_i t + (1/2) a * t^2

• v_f = v_i / t

In circular motion, the centripetal force always points outward from the center of the circle.

• True

• False

In the uniform circular motion the acceleration parallel to velocity is zero

• True

• False

The loops at the Batman Gotham City Escape at Warner's park describe an uniform circular motion

• True

• False

In the free fall motion the acceleration along the y-axis is zero

• True

• False

Tags

NGSS.HS-PS2-4

In the uniformly accelerated motion, the initial and final velocities always have the same magnitude.

• True

• False