Question

PART “B”
1.
a) Estimate your age in seconds.
b) Convert the following.
i) 9.5 kg to mg
ii)
0.53 x 10-10 m into pm
tower? = 3-6
3.
Calculate the distance travelled by the car before coming to rest.
rectangular components of force.
S. A missile is launched at 60° with the horizontal with speed of 100 m/s. if the acceleration of missile is 5
m/s? then what will b its horizontal distance after 15 seconds."
6. A door of width 150 cm is opened by the application of force of 100 N on its edge acting at an angle of 30°
calculate the torque produced in the door.
7. How much time will a ball take to reach the maximum height if it is thrown vertically upward with a speed
of 5 m/s?
2. A ball is dropped from the top of a tower and it takes 5 seconds to reach the ground, what is the height of
A car moving with the speed of 72 kph is uniformly brought to rest in 20 seconds by application of break.
4. A force of 100 N acting on a body and making an angle of 60° with the positive X - axis, determine the​

Answer 1

Answer:

• what a big question

Answer 2

Given

Force = 5N

Displacement = 6m

Angle between the force and the displacement is 30°

To Find

Work Done?

Solution

☯ Work = Fs cosθ

Here as the value of θ is 30°, then the value of cosθ = cos 30° which is √3/2

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✭ According to the Question :

→ Work = Fs cosθ

F = Force = 5 N

s = Displacement = 6 m

θ = Angle between the force & the Displacement = 30°

→ Work = 5 × 6 × cos 30°

→ Work = 5 × 6 × √3/2

→ Work = 30 × √3/2

→ Work = 15 × √3

→ Work = 15√3 J

or

→ Work = 15 × 1.73

→ Work = 25.95 J

∴ The work done by the force is 25.95 J