Question

Force and Laws of Motion:
A Parachutist jumps from an aircraft. After some time, he opens his parachute. The speed-time graph
for his motion is shown below:
Question 1:-At what points, is the air resistance greater than the weight of the body?
a)1 and 2 b)3 and 4 c)5 and 6 d)7 and 8
Question 2:-At what point(s), is the air resistance equal to the weight of the body?
a)1, 2,5 and 6 b)3,4,7 and 8 c)1 only d)1 and 5
Question 3:-Explain the shape of the above speed-time graph
Question 4:-During this motion, there are many forces acting on the man (parachutist), parachute and earth.
Some of them are:
A-Weight of the man
B-Force on man by parachute in upward direction
C-Air resistance
D-Force on parachute by man
E-Upward pull on earth
Which of these are Newton’s Third law pairs?
First pair Second pair
a A and C D and E
b A and E B and D
c A and E Only one pair
d A a

Answer 1

Explanation:

Force and Laws of Motion:

A Parachutist jumps from an aircraft. After some time, he opens his parachute. The speed-time graph

for his motion is shown below:

Question 1:-At what points, is the air resistance greater than the weight of the body?

a)1 and 2 b)3 and 4 c)5 and 6 d)7 and 8

Question 2:-At what point(s), is the air resistance equal to the weight of the body?

a)1, 2,5 and 6 b)3,4,7 and 8 c)1 only d)1 and 5

Question 3:-Explain the shape of the above speed-time graph

Question 4:-During this motion, there are many forces acting on the man (parachutist), parachute and earth.

Some of them are:

A-Weight of the man

B-Force on man by parachute in upward direction

C-Air resistance

D-Force on parachute by man

E-Upward pull on earth

Which of these are Newton’s Third law pairs?

First pair Second pair

a A and C D and E

b A and E B and D

c A and E Only one pairForce and Laws of Motion:

A Parachutist jumps from an aircraft. After some time, he opens his parachute. The speed-time graph

for his motion is shown below:

Question 1:-At what points, is the air resistance greater than the weight of the body?

a)1 and 2 b)3 and 4 c)5 and 6 d)7 and 8

Question 2:-At what point(s), is the air resistance equal to the weight of the body?

a)1, 2,5 and 6 b)3,4,7 and 8 c)1 only d)1 and 5

Question 3:-Explain the shape of the above speed-time graph

Question 4:-During this motion, there are many forces acting on the man (parachutist), parachute and earth.

Some of them are:

A-Weight of the man

B-Force on man by parachute in upward direction

C-Air resistance

D-Force on parachute by man

E-Upward pull on earth

Which of these are Newton’s Third law pairs?

First pair Second pairForce and Laws of Motion:

A Parachutist jumps from an aircraft. After some time, he opens his parachute. The speed-time graph

for his motion is shown below:

Question 1:-At what points, is the air resistance greater than the weight of the body?

a)1 and 2 b)3 and 4 c)5 and 6 d)7 and 8

Question 2:-At what point(s), is the air resistance equal to the weight of the body?

a)1, 2,5 and 6 b)3,4,7 and 8 c)1 only d)1 and 5

Question 3:-Explain the shape of the above speed-time graph

Question 4:-During this motion, there are many forces acting on the man (parachutist), parachute and earth.

Some of them are:

A-Weight of the man

B-Force on man by parachute in upward direction

C-Air resistance

D-Force on parachute by man

E-Upward pull on earth

Which of these are Newton’s Third law pairs?

First pair Second pair

a A and C D and E

b A and E B and D

c A and E Only one pair

d A a

a A and C D and E

b A and E B and D

c A and E Only one pair

d A a

d A a