For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement? a. 35° b. 45° c. 75° d. 80° e. 90°

option B. 45°

Explanation:

A body thrown at an angle from horizontal undergoes a projectile motion. The maximum horizontal displacement means the maximum range covered. The range is given by:

where v is the initial velocity, is angle of the projectile and g is the acceleration due to gravity.

For maximum range, sin 2θ = 1

2θ = sin⁻¹ 1 = 90°

θ = 90°/2 = 45°

Thus, the projectile undergoes maximum horizontal displacement at angle of 45°. Correct option is B.

0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2

radial fractures in a piece of glass look most like which of the following?

a. spokes of a wheel

b. a circle

c. a zig zag

d. none of the above

the correct answer is a. spokes of a wheel

hope this (: