Pls help Which one of the following is NOT acceleration A.
a change in mass
B.
a change in direction
C.
an increase in velocity
D.
a decrease in velocity

C

Explanation:

Am increase in velocity?

change in mass is not acceleration

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19