Author Question: An 8 kg object moving with an initial velocity of 4 m/s comes to rest due to friction after it ... (Read 85 times)

biggirl4568 · **on:** Jul 29, 2018

An 8 kg object moving with an initial velocity of 4 m/s comes to rest due to friction after it travels a horizontal distance of 10 m.

If the initial speed of the object is doubled, what distance will it travel before coming to rest? Use g = 10 m/s2. A)

10 m

B)

20 m

C)

30 m

D)

40 m

E)

80 m

Question 2

A semiconductor has an energy gap of 2.5 eV. What is the longest wavelength light of those listed below that will promote valence electrons into the conduction band?

A)

450 nm
B)

525 nm
C)

600 nm
D)

725 nm
E)

350 nm