Classwork 2/8

What is the force acting on a spring with a spring constant of 275 N/m that is stretched 14.3 cm?

• 2.81 N
• 39.3 N
• 19.2 N
• 3.93x10³⁰ N

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

• 0.25 m/s²

• 1.3 m/s²

• 1.6 m/s²

• 0.74 m/s²

Tags

NGSS.HS-PS2-1

A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?

• A
• B
• C
• D

What is the direction of the velocity at point B, if the ball is revolving clockwise?

• up
• right
• down
• left

What is the direction of the acceleration at point A, if the ball is revolving clockwise?

• up
• right
• down
• left

Tags

NGSS.HS-PS2-1

What is the direction of the acceleration at point B, if the ball is revolving clockwise?

• up
• right
• down
• left

Tags

NGSS.HS-PS2-1

The velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster

Which statement is true about an object that is traveling in uniform circular motion?

• The speed of the object varies.
• The net force on the object is directed toward the center of the circular path.
• The direction of the object's velocity is constant.
• The net force on the object is directed away from the center of the circular path.

Tags

NGSS.HS-PS2-1

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

What is the direction of the velocity at point A, if the ball is revolving clockwise?

• up
• right
• down
• left