Answer:
The change in momentum of the car is 30,000 kg m/s
Explanation:
Given,
The force exerted on the car to slow down, F = 7500 N
The time period of force, t = 4 s
The rate of change of momentum of the object is equal to the force acting on it.
Therefore,
<em> (mv - mu) / t = F</em>
Where v and u are the final and initial velocity of the car. The change in momentum of the car,
mv - mu = F x t
= 7500 x 4
= 30,000 kg m/s
Hence the change in momentum of the car is 30,000 kg m/s
Answer:
Explanation:
R = Horizontal range of projectile = 75 m
v = Velocity of projectile = 37 m/s
g = Acceleration due to gravity = 
Horizontal range is given by
The angle at which the arrow is to be released is .
Answer:
No distance is the length between two routes
Explanation:
Distance is the length of the route between two points. ... Direction is just as important as distance in describing motion. A vector is a quantity that has both size and direction. It can be used to represent the distance and direction of motion.
Answer:
The angular frequency is the coil rotating is 1.9 rad/s.
Explanation:
Given that,
Number of turns = 600
Radius = 15 cm
Magnetic field = 0.020 T
Maximum induced emf = 1.6 V
We need to calculate the angular frequency is the coil rotating
Using formula emf
When induced emf is maximum so 
will be 1.
Where, N = number of turns
A = area
B = magnetic field
Put the value into the formula
Hence, The angular frequency is the coil rotating is 1.9 rad/s.
Answer:
scratching a surface to make it rougher
increasing the size of a flying object
adding extra weight to an object
Explanation:
