Question

Sheldon and Penny are sitting in the back seat of a car that is moving in the x-direction with avelocity of 20 m/s. Sheldon makes a snide remark and Penny responds by throwing the cap ofher soda bottle at him with a velocity of 11 m/s (in what we'll call the y-direction) in theirreference frame. From the point of view of someone standing alongside the road, the speed ofthat cap would be closest to:

Answer 1

Complete Question

The complete question is shown on the first uploaded image

Answer:

The correct option is E

Step-by-step explanation:

From the question we are told that

The velocity in the x direction is
`v_x =  20 \ m/s`

The velocity of the cap of the soda bottle in the y direction is
`v_y  =  11 \  m/s`

Gnerally the speed of the cap as seen by the observer is mathematically represented as

`v_c = √(v_x^2 + v_y^2)`

=>
`v_c = √( 20^2 + 11^2)`

=>
`v_c = 22.83 \  m/s`

=>
`v_c = 23 \  m/s`