Answer:In physics, motion is defined as a change in the position of a body with respect to a reference point. ... Think about the motion of three cars: one in the fast-moving carpool lane, another in the middle lane, and the third in the slow lane used to enter or exit the freeway.
Explanation:
Answer:
Acceleration, ![a=-1.5\ m/s^2](https://tex.z-dn.net/?f=a%3D-1.5%5C%20m%2Fs%5E2)
Explanation:
It is given that,
Initial velocity of the car, u = 10 m/s (in right)
Final velocity of the car, v = -5 m/s (in left)
Time taken, t = 10 s
Let a is the acceleration of the car. It can be calculated using the equation of kinematics. The equation is as :
![v=u+at](https://tex.z-dn.net/?f=v%3Du%2Bat)
![a=\dfrac{v-u}{t}](https://tex.z-dn.net/?f=a%3D%5Cdfrac%7Bv-u%7D%7Bt%7D)
![a=-1.5\ m/s^2](https://tex.z-dn.net/?f=a%3D-1.5%5C%20m%2Fs%5E2)
So, the acceleration of the car is
. Hence, this is the required solution.
Answer:
When you release the opening of the balloon, gas quickly escapes to equalize the pressure inside with the air pressure outside of the balloon. The escaping air exerts a force on the balloon itself. ... That opposing force—called thrust, in this case—propels the rocket forward.
Answer:Speed of sound in steel is 6510m/s.
Explanation:
Speed, v= frequency,f÷ wavelength
v=?, f= 620, wavelength= 10.5
v= 620× 10.5
= 6510m/s
Efficiency of heat engine is determined by the ratio of difference in temperature of cold from hot reservoir to the temperature of hot reservoir over temperature of hot reservoir.