Answer:
V = 27.46 m/s
Explanation:
given,
mass of the deer(m) = 135 Kg
speed of the deer (u) = 10.5 m/s
assuming,
mass of the car(M) = 900 Kg
initial velocity of car (v) = 30 m/s
using conservation of momentum
m u + M v = (M + m )V
V is the velocity of the car as deer is on the car
135 x 10.5 + 900 x 30 = (900 + 135 ) V
28417.5 = 1035 V
V = 27.46 m/s
so, the velocity of car is equal to V = 27.46 m/s
Answer:
5 J
Explanation:
F = spring force required to stretch the spring = 10 N
x = stretch in the spring = 1 m
k = spring constant of the spring
Spring force is given as
F = k x
Inserting the values
10 = k (1)
k = 10 N/m
W = work done in stretching the spring
Work done is given as
W = (0.5)k x²
Inserting the values
W = (0.5) (10) (1)²
W = 5 J
Answer:
The towers height is 322m
Explanation:
We can assume that a simple pendulum hangs from the top of the tower.
In this case, the length of the pendulum will be the same as the height of the tower.
We will use the next expression then:
Where T is the period, L is the pendulum length and g is the gravity 
From the previous expression we will have then that the length will be:
Replacing:
The towers height will be then: 322m
High frequency = D, short wavelength
When a current is passed through a coil of wire with a piece of iron inside, the one that will be formed is :
an electromagnet
It happens when a soft metal core made into magnet by passage of electric current
hope this helps
