Question 761:

• JAMB 1994

An object is projected with a velocity of 80ms^-1 at an angle of 30^o to the horizontal.The maximum height reached is

A. 20m
B. 80m
C. 160m
D. 320m

Question 762:

• JAMB 1994

A motor vehicle is brought to rest from a speed of 15ms^-1 in 20 seconds. Calculate the retardation.

A. 0.75ms^-1
B. 1.33ms^-2
C. 5.00ms^-2
D. 7.50ms^-2

Question 763:

• JAMB 1994

Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity?

A. The energy is costant but the linear momentum varies
B. The linear momentum is conatant but the energy varies
C. Both energy and linear momentum are constant
D. The speed and the linear velocity are both constant

Question 764:

• JAMB 1994

An object of mass 50kg is released from a height of 2m.Find the kinetic energy just before it strikes the ground

A. 250J
B. 1000J
C. 10 000J
D. 100 000J

Question 765:

• JAMB 1994

A cone in an unstable equilibrium has its potential energy

A. Decreased
B. Increased
C. Unchanged
D. Oscillating