Acceleration = (change in speed) / (time for the change)
Change in speed = (speed at the end) - (speed at the beginning)
= (140 km/hr) - (10 km/hr) = 130 km/hr
Time for the change = 50 sec
Acceleration = (130 km/hr) / (50 sec) = 2.6 km/hr per second.
To convert to more familiar units:
(2.6 km/hr-sec) x (1000 m/km) x (1 hr/3600 sec)
= (2.6 x 1000 x 1) / (3600) km-m-hr / hr-sec-km-sec
= 0.722 m/s² (about 0.074 of a G)
Metals can form a sea of elections which causes them to be good conductors of energy
Answer:
<em>20m/s</em>
Explanation:
Given
Velocity = 40m/s
angle = 30°
Vertical component = Vsin theta
Substitute into the formula
Vy = 40sin30
Vy = 40(0.5)
Vy = 20m/s
<em>Hence the vertical component of the velocity right before the ball hits the ground is 20m/s</em>
Answer:
The car exerts a force on the truck which is c.) 6000 N.
Explanation:
If the truck exerts a force of 6000 N on the car then according to Newton's Third Law of Motion that every action has an equal and opposite reaction we can say that the force exerted by the car on the truck is 6000 N.
The only reason the truck is able to move the car is because of the frictional forces. That is frictional force of the trucks tires on the surface of the road and the frictional forces of the cars tire on the surface of the road, and since these forces are not equal this therefore gives rise to motion.
Power in watts is 2400 W and in horse power is 3.218 hp.
Explanation:
Power is defined as the amount of work done per unit time. From work energy theorem, the work done is equal to the difference in the kinetic energy. Since the initial speed is zero, so the initial kinetic energy will be zero. So the work done is equal to the final kinetic energy.
As the mass is 50 kg and velocity is 14.2 m/s with time 2.1 s, then the work done will be
Then this need to be convert to horse power as 1 horse power = 745.7 W.
So, power in horse power will be
So power in watts is 2400 W and in horse power is 3.218 hp.