A person of mass $42 k g$ eats bananas of $980 c a l$ . If this energy is used up to lift him from the ground, the height to which he can climb is _______. $[1 C a l = 4.2 J]$ .

10 m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

20 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

30 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

40 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $10 m$
Energy of Bananas $= 980 c a l = 980 \times 4.2 J$
Energy required to climb $= m g H$
where, $H =$ Height from the ground
$g =$ Acceleration due to gravity
$m =$ Mass of the person

Since, this energy is used up to lift him from the ground
$m g h = 980 \times 4.2$
$\Rightarrow 42 \times 9.8 \times H = 980 \times 4.2 (∵ g = 9.8 m / s^{2})$
$\Rightarrow H = 10 m$

So,the correct option will be $(A) .$

Suggest Corrections

Similar questions

Q. A girl weighing 42 Kg eats banana whose energy is 980 calories. If this energy is used go to height h. Find the value of h. (1 cal = 4.2J )

Q. Morning breakfast gives 5000 cal to a 60Kg person.The efficiency of person is 30%.The height upto which the person can climb up by using energy obtained from breakfast is:

Q. A bread gives a boy of mass

40 k g

an energy of

21 k J

. If the efficiency is

28

% then the height can be climbed by him using this energy is

Q. Morning breakfast gives

5000 cal

to a

60 kg

person. The efficiency of the person is

30 %

. The height upto which the person can climb by using the energy obtained from breakfast is [Take

g = 10 {m/s}^{2}

]

A rock climber climbs a hill at the rate of 3 m/s. If he starts climbing from 20 m above the ground surface, how much time will he take to climb the hill which is 200m in height? [3 MARKS]

Join BYJU'S Learning Program

A person of mass 42 kg eats bananas of 980 cal. If this energy is used up to lift him from the ground, the height to which he can climb is _______. [1 Cal=4.2 J].

A person of mass $42 k g$ eats bananas of $980 c a l$ . If this energy is used up to lift him from the ground, the height to which he can climb is _______. $[1 C a l = 4.2 J]$ .