3 years ago

a body is projected vertically upward with velocity u returns to starting points in 4 sec find the value of u if g=10m/s

Physics

1 answer:

Lesechka [4]3 years ago

7 0

Answer:

u = 39.2 m/s

Explanation:

use v = u — gt. since g is negative upwards.

You might be interested in

Which situation has the most potential energy

balu736 [363]

Answer:

Explanation: you are staying longr to jump 3 meters than one meter

4 0

3 years ago

A parachutist's fall to Earth is determined by two opposing forces. A gravitational force of 605 N acts on the parachutist. Afte

Doss [256]

Answer:15.8 m/s

Explanation:

Given

Gravitational Force $F_g=605 N$

Air resistance $F_d=689 N$

mass of Parachutist $=\frac{605}{9.8}=61.73 kg$

Velocity after $3 s$

$v=u+at$

$v=0+9.8\times 3$

$v=29.4 m/s$

Now Parachutist opens the parachute

Net for on Parachutist

$605-689=-84$

$84 N$ drag force

therefore deceleration $\frac{84}{61.73}=1.36 m/s^2$

velocity after 10 s is

$v_1=v+at$

$v_1=29.4-1.36\times 10$

$v_1=15.8 m/s$

7 0

4 years ago

A land breeze usually originates during the _____.

Nadusha1986 [10]

<span>evening and flows toward the water</span>

8 0

3 years ago

Read 2 more answers

In which orbitals would the valence electrons for selenium (Se) be placed?

LUCKY_DIMON [66]

s orbital and p orbital

hope this helps :)

8 0

4 years ago

Helppppppppppppppppppppppppppppppppppppppppppppppp

marta [7]

Answer:

My logic:

Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Universe.

Hope this helps!

8 0

3 years ago