Kinetic energy is definitely conserved

Indicate whether the statement is true or false


F

Physics & Space Science

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Projectile Motion: A boy kicks a football from ground level with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the horizontal distance to the point where the football hits the ground if we neglect air resistance?

A. 20 m B. 35 m C. 18 m D. 60 m E. 30.0 m

Physics & Space Science

A 550-g mass traveling at 8.0 m/s undergoes a head-on elastic collision with a 250-g mass traveling toward it also at 8.0 m/s. What is the speed of the 250-g mass after the collision?

A) 15 m/s B) 8.0 m/s C) 4.0 m/s D) 14 m/s E) 0 m/s

Physics & Space Science

The units T•m2/s are equivalent to:

a. V. c. W. b. N/m. d. webers.

Physics & Space Science

Light spreads out when it passes through a narrow slit because of

a. interference b. diffraction c. specular reflection d. diffuse reflection e. polarization

Physics & Space Science