Can an object's velocity change direction when its acceleration is constant?
A) Yes, this is possible, and a rock thrown straight up is an example.
B) No, this is not possible because it is always speeding up.
C) No, this is not possible because it is always slowing up.
D) Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example.
E) No, this is not possible because it is always speeding up or always slowing down, but it can never turn around.
A
You might also like to view...
Molecular Speeds: At what temperature would the root-mean-square speed of hydrogen, H2, molecules equal 11.2 km/s (the earth's escape speed)? The mass of a hydrogen atom is 1.67 × 10-27 kg, and the Boltzmann constant is 1.38 × 10-23 J/K.
A. 1.01 × 102 K B. 1.01 × 104 K C. 1.01 × 106 K D. 1.01 × 108 K
Protostars are difficult to observe because
a. the protostar stage is very short. b. they are surrounded by cocoons of gas and dust. c. they radiate mainly in the infrared. d. the protostar stage is very short, they are surrounded by cocoons of gas and dust, and they radiate mainly in the infrared. e. they are all so far away that the light hasn't reached us yet.
A projectile is launched from ground level with a certain speed. For any range less than the maximum range there are two possible launch angles that give the same range
Indicate whether the statement is true or false
A puddle holds 150 g of water. If 0.75 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)
a. –2.7°C c. -0.27°C b. +2.7°C d. +0.27°C