Question

Q4. The velocity-time graph for a car is shown in the figure below Velocity is given in km/h and
time is given in hour.
(3)
B
S
Knih
1-he
(a) Find the acceleration of the car in last three seconds
(b) Find the distance covered by the car from A to B.
(c)What is the maximum speed attained by the car.
Q5. (a) Obtain the formula F= ma from Newton's second law of motion.
(2+3=5)
(b) An object A of mass 2kg moving with a velocity of 3m/s collides head on with object B of mass
1kg moving in the opposite direction with a velocity of 4m/s, after collision both bodies stuck
together and move with a common velocity. Find this velocity.​

Answer 1

2

1

×v

0

×(6−1)=90

2

1

×v

0

×5=90

v

0

=36m/s

Acceleration =

4−1

v

0

=

3

36

=12m/s

2

Deceleration =

6−4

v

0

=

2

36

=18m/s

2