1 Sec. 2nd term

If the force acting on a body is tripled, the acceleration by which the body moves in the second case = ……….

• a2 = 3 a1

• a2 =1/3 a1

• a2 = 2 a1

• a2 = 1/2 a1

The graph illustrates the relation between the mass of the body and the reciprocal of its velocity ( $\frac{1}{V}$  ). so, the ratio 𝐦𝐨𝐦𝐞𝐧𝐭𝐮𝐦 𝐨𝐟 𝐛𝐨𝐝𝐲 (𝐁) : 𝐦𝐨𝐦𝐞𝐧𝐭𝐮𝐦 𝐨𝐟 𝐛𝐨𝐝𝐲 (𝐀) = ……………

• 2

• 3

•  $\sqrt{3}$  

• 1

A body of mass 100g is tied to a thread of 70 cm long, makes 4 complete rotations around point (M) in 10 seconds. So, its centripetal acceleration = ……….

• 39.84 m/ $s^2$

• 398.4 m/ $s^2$

• 2.4 m/ $s^2$

• 4.4 m/ $s^2$

Using the data on the figure , so, the acceleration at which the car moves …………….

• 0.6 m/ $s^2$ to the right

• 0.4 m/ $s^2$ to the right

• 0.4 m/ $s^2$ to the left

• 0.6 m/ $s^2$ to the left

The graphs illustrate how the acceleration changes as the reciprocal of the mass changes. Which one illustrates the greatest moving force ………

• A

• B

• C

• D

The graphs illustrate the relation between the momentum of a body and time. Which graph illustrates a force which is opposite to the motion direction? ………

• A

• B

• C

• D

A car of mass 1000 Kg moves in a curved road of diameter (50 m) at (10 m/s) speed. So, the friction force needed to keep the car from sliding out of the curve = ………….

• 400 N

• 2000 N

• 4000 N

• 200 N

In the hammer throw sport, knowing that the player makes (10) complete rotations in (8) seconds. Using the data on the figure. So, the tension affecting the player’s arm = ………

• 302.5 N

• 203.5 N

• 305.2 N

• 503.2 N

If the speed by which the body rotates in a circular path is doubled. So, the centripetal acceleration of the body …………

• Remains constant

• Decreases to half

• Increases to double

• Increases four times

As a body rotates in a circular path, which of the choices is correct ………

• A

• B

• C

• D