Answer:
The force required to push to stop the car is 288.67 N
Explanation:
Given that
Mass of the car, m = 1000 kg
Initial speed of the car, u = 1 m/s
The car and push on the hood at an angle of 30° below horizontal,
Distance, d = 2 m
Let F is the force must you push to stop the car.
According work energy theorem theorem, the work done is equal to the change in kinetic energy as :
The force required to push to stop the car is 288.67 N
Answer:
2.4 meters
Explanation:
Let
m1= 10 kg
m2= 6 kg
Distance of m2 from pivot = 4 m
Distance of m1 from pivot = x (suppose) =?
If system is not rotating then it should be in equilibrrium position. And in this case clock-wise and anti -clock wise torques should balance each other i-e
weight of m1 mass bolck × x = weight of m2 mass block × 4
m1×g× x = m2 × g × 4
==> 10×9.8×x= 6×9.8×4
==> x = 6×9.8×4 / 10×9.8
==> x = 24/10=2.4 m
Energy is the ability to do work.
So work can not be done without the transfer of energy from one body to another.
Work is the transfer of energy.
Answer:
0.83 m/s
Explanation:
FIrst of all, we have to find the time of flight, i.e. the time the baseball needs to reach the ground. This can be done by using the equation for the vertical motion:
where
h is the initial height
u = 0 is the initial vertical velocity
g = 9.8 m/s^2 is the acceleration of gravity
t is the time
Substituting h = 1.8 m and solving for t,
We know that the horizontal distance travelled by the ball is
d = 0.5 m
Therefore, we can find the horizontal velocity (which is constant during the whole motion):
B) a salesman
This doesn't make any sense, as bottled water goes through a more extensive purification process and is a scarcer resource. The person saying it likely cares more about selling you bottled water than protecting the environment or providing you with accurate information, which would be the priorities of an environmentalist of a scientist. A meteorologist is more focused on weather and climate, and thus is unlikely to make this assertion. <span />