Answer:
it’s the third option: 4,600,000 km
Explanation:
just took the test and that was correct
Answer:
mass of 1 kilogram to move with an acceleration of 1 m/s².
Inertia. An object will stay in their state of motion unless a force acts to changes the motion.
Answer:
At the maximum height the ball will have an instantaneous velocity of zero. The formula for instantaneous velocity is
v = v₀ + at
Where v is the instantaneous velocity, v₀ is the initial velocity, a is the acceleration due to gravity, -9.8 m/sec², and t is the time.
We need instantaneous velocity to = 0.
0 = 20 - 9.8t : Isolate t => 1st step: Add 9.8t to both sides
9.8t = 20 : Isolate t => 2nd step: Divide both sides by 9.8
t = 2.04 seconds (approximately)
Explanation:
Answer:
(a) The height of the cliff is 19.6 m
(b) The horizontal distance travelled by the ball is 60 m
Explanation:
Given;
initial horizontal velocity of the ball, u = 30 m/s
initial vertical velocity of the ball, v = 0
time taken for the ball to hit the ground, t = 2 s
(a) height of the cliff
h = vt + ¹/₂gt²
h = 0 + ¹/₂gt²
h = ¹/₂gt²
h = ¹/₂(9.8)(2)²
h = 19.6 m
(b) horizontal distance traveled by the ball = Range
Range = ut
Range = 30 (2)
Range = 60 m