Answer:
B. the force of friction of the road on the tires
Explanation:
Unless the car engine is like jet engine, the main force that accelerates the car forward is the force of friction of the road on the tires, which is ultimately driven by the force of engine on the tires shaft. As the engine, and the shaft are part of the system, their interaction is internal. According to Newton laws of motion, the acceleration needs external force, in this case it's the friction of the road on the tires.
The motor effect is the term used when a current-carrying wire in the presence of a magnetic field experiences a force.
F=g(m1*m2)/r^2
gravitational force is directly proportional to product of masses and inversely proportional to square of distance between them.so consequently mass should increase and distance should decrease
Answer:
Distance of the object is 8.6 m
Explanation:
As we know that the speed of sound at t degree C is given as
here we know that the temperature is
t = 20 degree C
so we have
now we know that bat heard the echo of sound in 0.05 s
so the to and fro distance of the object is d + d = 2d
so we have
