Answer:
11.8 m/s
Explanation:
At the top of the hill, there are two forces on the car: weight force pulling down (towards the center of the circle), and normal force pushing up (away from the center of the circle).
Sum of forces in the centripetal direction:
∑F = ma
mg − N = m v²/r
At the maximum speed, the normal force is 0.
mg = m v²/r
g = v²/r
v = √(gr)
v = √(9.8 m/s² × 14.2 m)
v = 11.8 m/s
B) moves with a constant speed until hitting the other end.
Answer:
TRUE
Explanation:
BECAUSE AN OBJECTS DENSITY SHOWS HOW MUCH WEIGHT IS PER CUBIC UNIT. LIKE SAD HAS MORE DENSITY THAN WATER SO IT SINKS WHILE WOOD HAS LESS DENSITY THAN WATER SO IT FLOATS
Answer:
Explanation: Convert temperatures to Kelvins.
22 C = 295 K
30 C = 303 K
According to Charles' law:
V1 / T1 = V2 / T2
7 / 295 = V2 / 303
V2 = (303 * 7) / 295
V2 = 7.18983 Litres which rounds to 7.19 litres.
