Question

Q1. A car moving at a velocity 25m/s accelerates at the rate of 5m/s2

for 5 seconds. Find its final velocity.

Q2. Define Universal law of gravitation. Also make diagram.

Q3. A body starting from rest accelerates at 2m/s 2

through a distance of 25m. Find the velocity attained by it.

Q4. A body starting from rest attains a velocity of 20m/s in 10 seconds. Find its acceleration and the distance

moved by it in this time.

Q5. A body comes to rest after moving a distance of 4m with an acceleration of 2m/s 2

.Find its initial velocity.

Q6. State Newton’s first law of motion ,with one example.

Q7. A car moves on a straight track with uniform motion. It has a velocity of 18m/s. What is its velocity after

15 seconds?

Q8. Derive second and third equation of motion graphically.

Q9. Explain Newton’s third law of motion.

Q10. Derive the expression of law of conservation of momentum

Q11 What is the universal gravitation constant? Write down its unit and value ?

Q12 If the mass of a body is 50 Kg is on the earth. Find the mass and weight of that object on the surface of

moon.

Q13 If the force of attraction between two bodies is F. Then calculate the force between them when

a. both the masses become three times.

b. distance between them become four times.

Q14 a. Differentiate between mass and weight.

b. Obtain the relation between g and G.

c. Calculate the value of acceleration due to gravity on the surface of earth.

Q15 If earth attracts an object of mass 10000kg on the surface of earth. Calculate the force experienced by the

object in N due to earth. Mass of earth=6x1024kg radius of earth=6.4x106m​

Answer 1

Answer:

Q :1

Explanation:

u= 25 meter per second

a= 5 meter per second square

t = 5 second

v=u+ 1/2 a t

v= 25 + 1/2 *5 *5

v= 25+ 12.5

v= 37.5 meter per second