Answer:
Explanation:
Given that:
The air resistance and friction = 700 N
The gravity caused force = 716 × 9.8 = 7016.8
Total force = (7016.8 + 700) N
Total force = 7716.8 N
∴
Answer:
49.3 m/s
Explanation:
The momentum is defined as the product of the object velocity and its mass.
So the momentum of the truck is
For the car to have the same momentum, its speed must be
Answer:
a) 4.40 s
b) 2.20 s
Explanation:
Given parameters are:
At constant power ,
initial speed of the car,
final speed of the car, mph
At full power,
initial speed of the car,
final speed of the car, mph
a)
At constant power,
At full power,
So
So, time to reach 64 mph speed is 4 times more than the initial time
s
b)
For final 64 mph speed,
= s
Answer:
c. in the absence of an unbalanced force, an object at rest will stay at rest and an object in motion will stay in motion.
Explanation:
First law: things keep doing what they are doing, unless force is applied.
The vertical velocity is affected by the acceleration of gravity (ignoring the effects of air resistance usually)